81400048821

Names of 81400048821

• Cardinal: 81400048821 can be written as Eighty-one billion, four hundred million, forty-eight thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 8.1400048821 × 10¹⁰

Factors of 81400048821

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1627

Divisors of 81400048821

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 13 21 27 39 63 91 117 151 189 273 351 453 819 1057 1359 1453 1963 2457 3171 4077 4359 5889 9513 10171 13077 13741 17667 18889 22801 28539 30513 39231 41223 53001 56667 68403 91539 123669 132223 159607 170001 205209 219403 274617 296413 371007 396669 478821 510003 615627 658209 889239 1190007 1436463 1535821 1974627 2074891 2667717 2852239 3570021 4309389 4607463 5923881 6224673 8003151 8556717 13822389 18674019 19965673 25670151 33129853 41467167 56022057 59897019 77010453 99389559 179691057 231908971 298168677 430688089 539073171 695726913 894506031 1292064267 2087180739 3014816623 3876192801 6261542217 9044449869 11628578403 27133349607 81400048821
• Sum of all divisors σ(n): 149514005760
• Sum of proper divisors (its aliquot sum) s(n): 68113956939
• 81400048821 is a deficient number, because the sum of its proper divisors (68113956939) is less than itself. Its deficiency is 13286091882

Bases of 81400048821

• Binary: 1001011110011110100100010110010110101₂
• Hexadecimal: 0x12F3D22CB5
• Base-36: 11E7HJN9

Squares and roots of 81400048821

• 81400048821 squared (81400048821²) is 6625967948061183490041
• 81400048821 cubed (81400048821³) is 539354114458561528384376567291661
• The square root of 81400048821 is 285306.9379124875
• The cube root of 81400048821 is 4333.8601056965

Scales and comparisons

• 81,400,048,821 seconds is equal to 2,588 years, 14 weeks, 4 hours, 40 minutes, 21 seconds.
• To count from 1 to 81,400,048,821 would take you about five thousand, one hundred seventy-six 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 81400048821 cubic inches would be around 361.2 feet tall.

Recreational maths with 81400048821

• 81400048821 backwards is 12884000418
• The number of decimal digits it has is: 11
• The sum of 81400048821's digits is 36
• More coming soon!