81993198800

Names of 81993198800

• Cardinal: 81993198800 can be written as Eighty-one billion, nine hundred ninety-three million, one hundred ninety-eight thousand, eight hundred.

Scientific notation

• Scientific notation: 8.19931988 × 10¹⁰

Factors of 81993198800

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 90926

Divisors of 81993198800

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 37 40 50 61 74 80 100 122 148 185 200 244 296 305 370 400 488 592 610 740 925 976 1220 1480 1525 1850 2257 2440 2960 3050 3700 4514 4880 6100 7400 9028 11285 12200 14800 18056 22570 24400 36112 45140 56425 90280 90821 112850 180560 181642 225700 363284 451400 454105 726568 902800 908210 1453136 1816420 2270525 3360377 3632840 4541050 5540081 6720754 7265680 9082100 11080162 13441508 16801885 18164200 22160324 26883016 27700405 33603770 36328400 44320648 53766032 55400810 67207540 84009425 88641296 110801620 134415080 138502025 168018850 204982997 221603240 268830160 277004050 336037700 409965994 443206480 554008100 672075400 819931988 1024914985 1108016200 1344150800 1639863976 2049829970 2216032400 3279727952 4099659940 5124574925 8199319880 10249149850 16398639760 20498299700 40996599400 81993198800
• Sum of all divisors σ(n): 205631543352
• Sum of proper divisors (its aliquot sum) s(n): 123638344552
• 81993198800 is an abundant number, because the sum of its proper divisors (123638344552) is greater than itself. Its abundance is 41645145752

Bases of 81993198800

• Binary: 1001100010111001011001110110011010000₂
• Hexadecimal: 0x13172CECD0
• Base-36: 11O0MT3K

Squares and roots of 81993198800

• 81993198800 squared (81993198800²) is 6722884649456321440000
• 81993198800 cubed (81993198800³) is 551230817572340475746622272000000
• The square root of 81993198800 is 286344.5456089569
• The cube root of 81993198800 is 4344.3613698969

Scales and comparisons

• 81,993,198,800 seconds is equal to 2,607 years, 6 weeks, 5 days, 8 hours, 33 minutes, 20 seconds.
• To count from 1 to 81,993,198,800 would take you about five thousand, two hundred fourteen 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 81993198800 cubic inches would be around 362 feet tall.

Recreational maths with 81993198800

• 81993198800 backwards is 00889139918
• The number of decimal digits it has is: 11
• The sum of 81993198800's digits is 56
• More coming soon!