138436218991

Names of 138436218991

• Cardinal: 138436218991 can be written as One hundred thirty-eight billion, four hundred thirty-six million, two hundred eighteen thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 1.38436218991 × 10¹¹

Factors of 138436218991

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 189

Divisors of 138436218991

• Number of divisors d(n): 48
• Complete list of divisors:
  1 7 19 49 133 163 343 361 931 1141 2527 3097 6517 6859 7987 17689 21679 48013 55909 58843 123823 130321 151753 336091 411901 912247 1062271 1118017 2352637 2476099 2883307 6385729 7826119 17332693 20183149 21242323 44700103 54782833 121328851 148696261 383479831 403604137 849301957 1040873827 2825228959 7286116789 19776602713 138436218991
• Sum of all divisors σ(n): 171456096000
• Sum of proper divisors (its aliquot sum) s(n): 33019877009
• 138436218991 is a deficient number, because the sum of its proper divisors (33019877009) is less than itself. Its deficiency is 105416341982

Bases of 138436218991

• Binary: 10000000111011011100010001000001101111₂
• Hexadecimal: 0x203B71106F
• Base-36: 1RLHCM7J

Squares and roots of 138436218991

• 138436218991 squared (138436218991²) is 19164586728524109058081
• 138436218991 cubed (138436218991³) is 2653072925221975827787668054216271
• The square root of 138436218991 is 372070.1801958873
• The cube root of 138436218991 is 5173.0885173301

Scales and comparisons

• 138,436,218,991 seconds is equal to 4,401 years, 43 weeks, 6 days, 1 hour, 16 minutes, 31 seconds.
• To count from 1 to 138,436,218,991 would take you about eight thousand, eight hundred three 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 138436218991 cubic inches would be around 431.1 feet tall.

Recreational maths with 138436218991

• 138436218991 backwards is 199812634831
• The number of decimal digits it has is: 12
• The sum of 138436218991's digits is 55
• More coming soon!