642347871138

Names of 642347871138

• Cardinal: 642347871138 can be written as Six hundred forty-two billion, three hundred forty-seven million, eight hundred seventy-one thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 6.42347871138 × 10¹¹

Factors of 642347871138

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 4404162

Divisors of 642347871138

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 6 9 18 27 37 54 73 74 111 146 219 222 333 438 657 666 999 1314 1971 1998 2701 3942 5402 8103 16206 24309 48618 72927 145854 4404047 8808094 13212141 26424282 39636423 79272846 118909269 162949739 237818538 321495431 325899478 488849217 642990862 964486293 977698434 1466547651 1928972586 2893458879 2933095302 4399642953 5786917758 8680376637 8799285906 11895330947 17360753274 23790661894 35685992841 71371985682 107057978523 214115957046 321173935569 642347871138
• Sum of all divisors σ(n): 1486101957120
• Sum of proper divisors (its aliquot sum) s(n): 843754085982
• 642347871138 is an abundant number, because the sum of its proper divisors (843754085982) is greater than itself. Its abundance is 201406214844

Bases of 642347871138

• Binary: 1001010110001110111010101010101110100010₂
• Hexadecimal: 0x958EEAABA2
• Base-36: 8739C5GI

Squares and roots of 642347871138

• 642347871138 squared (642347871138²) is 412610787555520653415044
• 642347871138 cubed (642347871138³) is 265039660994862274700344242942600072
• The square root of 642347871138 is 801466.0760992945
• The cube root of 642347871138 is 8628.2640976707

Scales and comparisons

• 642,347,871,138 seconds is equal to 20,424 years, 35 weeks, 20 hours, 12 minutes, 18 seconds.
• To count from 1 to 642,347,871,138 would take you about forty thousand, eight hundred forty-nine years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 642347871138 cubic inches would be around 719 feet tall.

Recreational maths with 642347871138

• 642347871138 backwards is 831178743246
• 642347871138 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 642347871138's digits is 54
• More coming soon!