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A quadrillion is equal to 1015 in America, or 1024 in France and Germany.[1]
File:Quadrillion Dollars.jpg

In the long scale, 1015 is called billiard (not to be confused with a game), which is commonly used in France and Germany.

This number is also called pentillion in Russ Rowlett's Greek-based naming system.[2]

Donald Knuth calls this number femtiad, and it's equal to using the -yllion system.

Sbiis Saibian gave the names small fry, guppycrumb, and minnowspeck,[3] referring to the value of this number.

This number is known as a padma in the Indian counting system.[4]

Decimal Edit

Examples Edit

  • The Niagara Falls use up a quadrillion gallons in a little over 210 years.
  • The Great Lakes have a volume of about 6 quadrillion gallons.
  • The universe is about 473 quadrillion seconds old.
  • It is about 586 quadrillion miles from one end of the Milky Way to the other.[5]
  • The SI prefix peta- multiplies by one quadrillion.

As a banknote denomination Edit

File:QuadrillionBanknote.jpg

Only the Hungarian pengő had banknotes with this number in the denomination.

Gallery Edit

Sources Edit

  1. Quadrillion at Wolfram MathWorld
  2. Names for Large Numbers
  3. Hyper-E Notation, Large Numbers
  4. [1]
  5. Template:Citation/CS1

See also Edit

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