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A billion is equal to 109 = 1,000,000,000.[1] Like a million, a billion is often used as an exaggeration to mean an indefinitely large number.

In the long scale, 109 is called milliard, whereas "billion" refers to 1012. These definitions are no longer used in English-speaking countries, but there are equivalents in other languages such as French and German.

To prevent confusion with the similar sounding āmillionā, or with 1012, even some languages, such as Turkish, which otherwise use short scale, use the term āmilliardā (Turkish: āmilyarā) for 109.

Other names for this number are gillion[2] (from giga-, in Rowlett's Greek-based system) and tretillion[3] (by Aarex Tiaokhiao).

Aarex Tiaokhiao calls this number noovol, 9-noogol[4], or goonaolheptault, and it's equal to a(10,100,0)x[7] in Aarex's Array Notation.[5]

Username5243 calls this number niloogolsextiplex or goonvol, and it's equal to 10[1]9 in Username5243's Array Notation.[6]

This number is called one arab in the Indian number system[7].

## Examples Edit

• One billion seconds is roughly 31.7 years, and billion minutes is close to two millenia. 12:32 AM, April 29, 1902 marked exactly one billion minutes from 1 A.D.
• The internet contains more than a billion webpages.[8]
• It would take 951 years for a faucet running on full power to waste a billion gallons of water.[8]
• Gangnam Style, a hit single/music video by Korean rapper PSY, became the first YouTube video to reach 1 billion views in December 2012. It has nearly 3 billion views, and it held the former record of the video with the most views. The current record is Despacito with more than 4.14 billion views.[9]
• The world population is around 7.5 billion.
• The SI prefix giga- multiplies by one billion.
• You could make 1,000 sand castles each containing a million grains of sand with 1 billion grains of sand.
• The oldest billionaire of all time was Walter Haefner who died at the age of 101.

## Currency-related use Edit

Some currencies, such as the German Papiermark, the Hungarian pengÅ and the third Zimbabwean dollar, had banknotes with this number in the denomination.

It was also the prize for correctly answering all fifteen questions in the Italian game show Chi vuol essere miliardario? in Italian lire.

Furthermore, it was also the prize for correctly answering the first six questions in the Turkish game show Kim 500 Milyar Ä°ster? in first Turkish lira.