81003491824

Names of 81003491824

• Cardinal: 81003491824 can be written as Eighty-one billion, three million, four hundred ninety-one thousand, eight hundred twenty-four.

Scientific notation

• Scientific notation: 8.1003491824 × 10¹⁰

Factors of 81003491824

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 712

Divisors of 81003491824

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 8 16 29 58 79 116 158 181 232 316 362 421 464 632 724 841 842 1264 1448 1682 1684 2291 2896 3364 3368 4582 5249 6728 6736 9164 10498 12209 13456 14299 18328 20996 24418 28598 33259 36656 41992 48836 57196 66439 66518 76201 83984 97672 114392 132878 133036 152221 152402 195344 228784 265756 266072 304442 304804 354061 414671 531512 532144 608884 609608 708122 829342 964511 1063024 1217768 1219216 1416244 1658684 1929022 2209829 2435536 2832488 3317368 3858044 4419658 5664976 6019879 6634736 7716088 8839316 12025459 12039758 15432176 17678632 24050918 24079516 27970819 35357264 48101836 48159032 55941638 64085041 96203672 96318064 111883276 128170082 174576491 192407344 223766552 256340164 349152982 447533104 512680328 698305964 1025360656 1396611928 2793223856 5062718239 10125436478 20250872956 40501745912 81003491824
• Sum of all divisors σ(n): 165902784320
• Sum of proper divisors (its aliquot sum) s(n): 84899292496
• 81003491824 is an abundant number, because the sum of its proper divisors (84899292496) is greater than itself. Its abundance is 3895800672

Bases of 81003491824

• Binary: 1001011011100001011110011000111110000₂
• Hexadecimal: 0x12DC2F31F0
• Base-36: 117NDYB4

Squares and roots of 81003491824

• 81003491824 squared (81003491824²) is 6561565687680834846976
• 81003491824 cubed (81003491824³) is 531509732534693443048514707124224
• The square root of 81003491824 is 284611.1238585027
• The cube root of 81003491824 is 4326.8108838765

Scales and comparisons

• 81,003,491,824 seconds is equal to 2,575 years, 34 weeks, 2 days, 9 hours, 57 minutes, 4 seconds.
• To count from 1 to 81,003,491,824 would take you about five thousand, one hundred fifty-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 81003491824 cubic inches would be around 360.6 feet tall.

Recreational maths with 81003491824

• 81003491824 backwards is 42819430018
• The number of decimal digits it has is: 11
• The sum of 81003491824's digits is 40
• More coming soon!