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1,000,000,000

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1000000000
CardinalOne billion (short scale)
One thousand million, or one milliard (long scale)
OrdinalOne billionth (short scale)
Factorization29 · 59
Greek numeral<math>\stackrel{\iota}{\Mu}</math>
Roman numeralM
Binary1110111001101011001010000000002
TernaryTemplate:Ternary
QuaternaryTemplate:Quaternary
QuinaryTemplate:Quinary
SenaryTemplate:Senary
Octal73465450008
Duodecimal23AA9385412
Hexadecimal3B9ACA0016
VigesimalTemplate:Vigesimal
Base 36GJDGXS36

1,000,000,000 (one billion, short scale; one thousand million or milliard, yard,[1] long scale) is the natural number following 999,999,999 and preceding 1,000,000,001. One billion can also be written as b or bn.[2][3]

In scientific notation, it is written as 1 × 109. The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is G.

One billion years may be called an eon/aeon in astronomy or geology.

Previously in British English (but not in American English), the word "billion" referred exclusively to a million millions (1,000,000,000,000). However, this is no longer common, and the word has been used to mean one thousand million (1,000,000,000) for several decades.[4]

The term milliard can also be used to refer to 1,000,000,000; whereas "milliard" is rarely used in English,[5] variations on this name often appear in other languages.

In the South Asian numbering system, it is known as 100 crore or 1 arab.

Visualization of powers of ten from one to 1 billion

Sense of scale[edit source | edit]

The facts below give a sense of how large 1,000,000,000 (109) is in the context of time according to current scientific evidence:

Time[edit source | edit]

  • 109 seconds (1 gigasecond) is approximately 31.7 years
  • About 109 minutes ago, the Roman Empire was flourishing and Christianity was emerging. (109 minutes is roughly 1,901 years.)
  • About 109 hours ago, modern human beings and their ancestors were living in the Stone Age (more precisely, the Middle Paleolithic). (109 hours is roughly 114,080 years.)
  • About 109 days ago, Australopithecus, an ape-like creature related to an ancestor of modern humans, roamed the African savannas. (109 days is roughly 2.738 million years.)
  • About 109 months ago, dinosaurs walked the Earth during the late Cretaceous. (109 months is roughly 83.3 million years.)
  • About 109 years—a gigaannus—ago, the first multicellular eukaryotes appeared on Earth.
  • About 109 decades ago, galaxies began to appear in the early Universe which was then 3.799 billion years old. (109 decades is exactly 10 billion years.)
  • The universe is thought to be about 13.8 × 109 years old.[6]

Distance[edit source | edit]

  • 109 inches is 15,783 miles (25,400 km), more than halfway around the world and thus sufficient to reach any point on the globe from any other point.
  • 109 metres (called a gigametre) is almost three times the distance from the Earth to the Moon.
  • 109 kilometres (called a terameter) is over six times the distance from the Earth to the Sun.

Area[edit source | edit]

  • A billion square inches would be a square about one half mile on a side.
  • A piece of finely woven bed sheet cloth that contained a billion holes would measure about 500 square feet (46 m2), large enough to cover a moderate sized apartment.

Volume[edit source | edit]

  • There are a billion cubic millimetres in a cubic metre and there are a billion cubic metres in a cubic kilometre.
  • A billion grains of table salt or granulated sugar would occupy a volume of about 2.5 cubic feet (0.071 m3).
  • A billion cubic inches would be a volume comparable to a large commercial building slightly larger than a typical supermarket.

Weight[edit source | edit]

  • Any object that weighs one billion kilograms (2.2×109 lb) would weigh about as much as 5,525 empty Boeing 747-400s.
  • A cube of iron that weighs one billion pounds (450,000,000 kg) would be 1,521 feet 4 inches (0.28813 mi; 463.70 m) on each side.

Products[edit source | edit]

Nature[edit source | edit]

  • A small mountain, slightly larger than Stone Mountain in Georgia, United States, would weigh (have a mass of) a billion tons.
  • There are billions of worker ants in the largest ant colony in the world,[9] which covers almost 4,000 miles (6,400 km) of the Mediterranean coast.
  • In 1804, the world population was one billion.

Count[edit source | edit]

A is a cube; B consists of 1000 cubes the size of cube A, C consists of 1000 cubes the size of cube B; and D consists of 1000 cubes the size of cube C. Thus there are 1 million A-sized cubes in C; and 1,000,000,000 A-sized cubes in D.

Billion-cubes-new.svg

Selected 10-digit numbers (1,000,000,001–9,999,999,999)[edit source | edit]

1,000,000,001 to 1,999,999,999[edit source | edit]

2,000,000,000 to 2,999,999,999[edit source | edit]

  • 2,038,074,743 – 100,000,000th prime number
  • 2,147,483,647 – 8th Mersenne prime and the largest signed 32-bit integer.
  • 2,147,483,648 – 231
  • 2,176,782,336 – 612
  • 2,214,502,422 – 6th primary pseudoperfect number.[18]
  • 2,357,947,691 – 119
  • 2,562,890,625 – 158
  • 2,971,215,073 – 11th Fibonacci prime (47th Fibonacci number).

3,000,000,000 to 3,999,999,999[edit source | edit]

  • 3,166,815,962 – 26th Pell number.[14]
  • 3,192,727,797 – 24th Motzkin number.[13]
  • 3,323,236,238 – 31st Wedderburn–Etherington number.[16]
  • 3,405,691,582 – hexadecimal CAFEBABE; used as a placeholder in programming.
  • 3,405,697,037 – hexadecimal CAFED00D; used as a placeholder in programming.
  • 3,486,784,401 – 320
  • 3,735,928,559 – hexadecimal DEADBEEF; used as a placeholder in programming.

4,000,000,000 to 4,999,999,999[edit source | edit]

  • 4,294,836,223 – 16th Carol number.[11]
  • 4,294,967,291 – Largest prime 32-bit unsigned integer.
  • 4,294,967,295 – Maximum 32-bit unsigned integer (FFFFFFFF16), perfect totient number, product of the five prime Fermat numbers <math>F_0</math> through <math>F_4</math>.
  • 4,294,967,296 – 232
  • 4,294,967,297 – <math>F_5</math>, the first composite Fermat number.
  • 4,295,098,367 – 15th Kynea number.[12]
  • 4,807,526,976 – 48th Fibonacci number.

5,000,000,000 to 5,999,999,999[edit source | edit]

  • 5,159,780,352 – 129
  • 5,354,228,880 – superior highly composite number, smallest number divisible by all the numbers 1 through 24
  • 5,784,634,181 – 13th alternating factorial.[19]

6,000,000,000 to 6,999,999,999[edit source | edit]

7,000,000,000 to 7,999,999,999[edit source | edit]

  • 7,645,370,045 – 27th Pell number.[14]
  • 7,778,742,049 – 49th Fibonacci number.
  • 7,862,958,391 – 32nd Wedderburn–Etherington number.[16]

8,000,000,000 to 8,999,999,999[edit source | edit]

9,000,000,000 to 9,999,999,999[edit source | edit]

References[edit source | edit]

  1. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  2. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  3. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  4. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  5. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  6. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  7. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  8. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  9. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  10. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  11. 11.0 11.1 Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  12. 12.0 12.1 Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  13. 13.0 13.1 13.2 Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  14. 14.0 14.1 14.2 Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  15. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  16. 16.0 16.1 16.2 Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  17. 17.0 17.1 Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  18. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  19. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  20. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  21. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  22. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).
  23. Lua error in ...ribunto/includes/engines/LuaCommon/lualib/mwInit.lua at line 23: bad argument #1 to 'old_ipairs' (table expected, got nil).