81326490140

Names of 81326490140

• Cardinal: 81326490140 can be written as Eighty-one billion, three hundred twenty-six million, four hundred ninety thousand, one hundred forty.

Scientific notation

• Scientific notation: 8.132649014 × 10¹⁰

Factors of 81326490140

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 1463644

Divisors of 81326490140

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 5 7 10 14 20 28 35 70 140 397 794 1588 1985 2779 3970 5558 7940 11116 13895 27790 55580 1463233 2926466 5852932 7316165 10242631 14632330 20485262 29264660 40970524 51213155 102426310 204852620 580903501 1161807002 2323614004 2904517505 4066324507 5809035010 8132649014 11618070020 16265298028 20331622535 40663245070 81326490140
• Sum of all divisors σ(n): 195675356352
• Sum of proper divisors (its aliquot sum) s(n): 114348866212
• 81326490140 is an abundant number, because the sum of its proper divisors (114348866212) is greater than itself. Its abundance is 33022376072

Bases of 81326490140

• Binary: 1001011101111011011111100001000011100₂
• Hexadecimal: 0x12EF6FC21C
• Base-36: 11CZOXEK

Squares and roots of 81326490140

• 81326490140 squared (81326490140²) is 6613997998491517219600
• 81326490140 cubed (81326490140³) is 537893243010300110033439614744000
• The square root of 81326490140 is 285177.9972929187
• The cube root of 81326490140 is 4332.5542542725

Scales and comparisons

• 81,326,490,140 seconds is equal to 2,585 years, 48 weeks, 2 days, 19 hours, 42 minutes, 20 seconds.
• To count from 1 to 81,326,490,140 would take you about five thousand, one hundred seventy-one 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 81326490140 cubic inches would be around 361 feet tall.

Recreational maths with 81326490140

• 81326490140 backwards is 04109462318
• The number of decimal digits it has is: 11
• The sum of 81326490140's digits is 38
• More coming soon!