April 16, 2009

Large Numbers

People sometimes confused about the large numbers. Here is a table. The system used in the U.S. is not as logical as that used in other countries (like Great Britain, France, and Germany). In these other countries, a billion (bi meaning two) has twice as many zeros as a million, and a trillion (tri meaning three) has three times as many zeros as a million, etc. But the scientific community seems to use the American system.

No. of 0's U.S. & scientific Other countries Byte

3 thousand thousand KiloByte

6 million million MegaByte

9 billion 1000 million (1 milliard) GigaByte

12 trillion billion TeraByte

15 quadrillion 1000 billion PetaByte

18 quintillion trillion ExaByte

21 sextillion 1000 trillion ZettaByte

24 septillion quadrillion YottaByte

27 octillion 1000 quadrillion

30 nonillion quintillion

33 decillion 1000 quintillion

36 undecillion sextillion

39 duodecillion 1000 sextillion

42 tredecillion septillion

45 quattuordecillion 1000 septillion

48 quindecillion octillion

51 sexdecillion 1000 octillion

54 septendecillion nonillion

57 octodecillion 1000 nonillion

60 novemdecillion decillion

63 vigintillion 1000 decillion

Some other large but not famous numbers :-

1. Googol :-

Googol is the large number 10100, that is, the digit 1 followed by one hundred zero (in decimal representation). The term was coined in 1920 by nine-year-old Milton Sirotta.Sometimes Googol is called as Google .

Googol is of no particular significance in mathematics, but is useful when comparing with other incredibly large quantities such as the number of subatomic particles in the visible universe or the number of possible chess games. Kasner created it to illustrate the difference between an unimaginably large number and infinity, and in this role it is sometimes used in teaching mathematics.

A googol can be written in conventional notation as follows:

1 googol
= 10100
= 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,

2. Googolplex:-

A googolplex is 1 followed by a googol of zeroes, or ten raised to the power of a googol:
10googol = 1010100.

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