81618996406842

Names of 81618996406842

• Cardinal: 81618996406842 can be written as Eighty-one trillion, six hundred eighteen billion, nine hundred ninety-six million, four hundred six thousand, eight hundred forty-two.

Scientific notation

• Scientific notation: 8.1618996406842 × 10¹³

Factors of 81618996406842

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 991

Divisors of 81618996406842

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 6 9 18 27 54 127 254 381 762 859 1143 1718 2286 2577 3429 5154 6858 7731 15462 16129 23193 32258 46386 48387 96774 109093 145161 218186 290322 327279 435483 654558 737881 870966 981837 1475762 1963674 2048383 2213643 2945511 4096766 4427286 5891022 6145149 6640929 12290298 13281858 13854811 18435447 19922787 27709622 36870894 39845574 41564433 55306341 83128866 93710887 110612682 124693299 187421774 249386598 281132661 374079897 562265322 748159794 843397983 1686795966 1759560997 2530193949 3519121994 5060387898 5278682991 10557365982 11901282649 15836048973 23802565298 31672097946 35703847947 47508146919 71407695894 95016293838 107111543841 214223087682 321334631523 642669263046 1511462896423 3022925792846 4534388689269 9068777378538 13603166067807 27206332135614 40809498203421 81618996406842
• Sum of all divisors σ(n): 183028106188800
• Sum of proper divisors (its aliquot sum) s(n): 101409109781958
• 81618996406842 is an abundant number, because the sum of its proper divisors (101409109781958) is greater than itself. Its abundance is 19790113375116

Bases of 81618996406842

• Binary: 10010100011101101100111010010011010101000111010₂
• Hexadecimal: 0x4A3B6749AA3A
• Base-36: SXJ8Z4CAI

Squares and roots of 81618996406842

• 81618996406842 squared (81618996406842²) is 6661660574460087306784412964
• 81618996406842 cubed (81618996406842³) is 543718050490458879486578614637848283099688
• The square root of 81618996406842 is 9034323.2401127867
• The cube root of 81618996406842 is 43377.4232577673

Scales and comparisons

• 81,618,996,406,842 seconds is equal to 2,595,231 years, 32 weeks, 2 days, 6 hours, 20 minutes, 42 seconds.
• To count from 1 to 81,618,996,406,842 would take you about six million, four hundred eighty-eight thousand and seventy-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 81618996406842 cubic inches would be around 3614.8 feet tall.

Recreational maths with 81618996406842

• 81618996406842 backwards is 24860469981618
• The number of decimal digits it has is: 14
• The sum of 81618996406842's digits is 72
• More coming soon!