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A tredecillion or septilliad or Septilliard[1] is equal to 1042 in America, or 1078 in France and Germany.[2]

In the long scale, 1042 is called septillion, which is commonly used in France and Germany.

This number is also called tetradekillion in Russ Rowlett's Greek-based naming system.[3]

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

Decimal expansion Edit

  • 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000 - short scale
  • 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 - long scale

Examples Edit

  • There is about 100 tredecillion grams of matter contained in the grand total of all the stars in the Milky Way Galaxy.
  • There are about 200 tredecillion atoms contained in the entire atmosphere of the Earth[4]
  • The prefix tenatera- multiplies by one tredecillion.

List of prefixed numbers derived from decillion Edit

Name Short scale Long scale
undecillion 1036 1066
duodecillion 1039 1072
tredecillion 1042 1078
quattuordecillion 1045 1084
quindecillion 1048 1090
sexdecillion 1051 1096
septendecillion 1054 10102
octodecillion 1057 10108
novemdecillion 1060 10114

Sources Edit

  1. Sbiis Saibian's Ultimate Finite Numbers List Part I
  2. Tredecillion at Wolfram MathWorld
  3. Names for Large Numbers
  4. Saibian, Sbiis. Larger numbers in science.

See also Edit

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