• 1 = One
    10 = Ten
    100 = One hundred
    1000 = One thousand
    86400 = The number of seconds in a day
    1000000 = One million
    31556926 = The number of seconds in a year
    1000000000 = One billion
    7000000000 = The estimated human population on Earth (2011)
    1000000000000 = One trillion
    1000000000000000 = One quadrillion
    1000000000000000000 = One quintillion
    1000000000000000000000 = One sextillion
    1000000000000000000000000 = One septillion
    1000000000000000000000000000 = One octillion
    1000000000000000000000000000000 = One nonillion
    1000000000000000000000000000000000 = One decillion
    1000000000000000000000000000000000000 = One undecillion
    1000000000000000000000000000000000000000 = One duodecillion
    1000000000000000000000000000000000000000000 = One tredecillion
    1000000000000000000000000000000000000000000000 = One quattuordecillion
    1000000000000000000000000000000000000000000000000 = One quindecillion
    1000000000000000000000000000000000000000000000000000 = One sexdecillion
    1000000000000000000000000000000000000000000000000000000 = One septendecillion
    1000000000000000000000000000000000000000000000000000000000 = One octodecillion
    1000000000000000000000000000000000000000000000000000000000000 = One novemdecillion
    1000000000000000000000000000000000000000000000000000000000000000 = One vigintillion

    10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 = One googol (the number 1 followed by 100 zeros)

    10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
    00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
    000000000000000000000000 = One centillion (the number 1 followed by 303 zeros)