Quadrillion

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Quadrillion may mean either of the two numbers (see long and short scales for more detail):

• 1,000,000,000,000,000 (one thousand million million; 10¹⁵; SI prefix peta-) - for all short scale countries - increasingly common meaning in English language usage
• 1,000,000,000,000,000,000,000,000 (one million million million million; 10²⁴; SI prefix: yotta-) - for all long scale countries - increasingly rare meaning in English language usage

[edit] See also

Names of large numbers

Mathematics portal

Subarticles Names of large numbers · Law of large numbers · History of large numbers Examples (numerical order) Standardized list · Name list million · billion · trillion · quadrillion · googol · googolplex · Skewes' number · Moser's number · Graham's number · Transfinite numbers · Infinity Expression methods Notations Steinhaus-Moser notation · Knuth's up-arrow notation · Conway chained arrow notation Operators Hyper operators · Ackermann function · Tetration Related articles Number systems · Number names · Orders of magnitude (numbers) · List of numbers · Indefinite and fictitious numbers

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