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


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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