81279672320

Names of 81279672320

• Cardinal: 81279672320 can be written as Eighty-one billion, two hundred seventy-nine million, six hundred seventy-two thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.127967232 × 10¹⁰

Factors of 81279672320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 25796

Divisors of 81279672320

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 44 55 56 64 70 77 80 88 110 112 128 140 154 160 176 220 224 256 280 308 320 352 385 440 448 512 560 616 640 704 770 880 896 1024 1120 1232 1280 1408 1540 1760 1792 2048 2240 2464 2560 2816 3080 3520 3584 4096 4480 4928 5120 5632 6160 7040 7168 8192 8960 9856 10240 11264 12320 14080 14336 17920 19712 20480 22528 24640 25771 28160 28672 35840 39424 40960 45056 49280 51542 56320 57344 71680 78848 90112 98560 103084 112640 128855 143360 157696 180397 197120 206168 225280 257710 283481 286720 315392 360794 394240 412336 450560 515420 566962 630784 721588 788480 824672 901985 1030840 1133924 1417405 1443176 1576960 1649344 1803970 1984367 2061680 2267848 2834810 2886352 3153920 3298688 3607940 3968734 4123360 4535696 5669620 5772704 6597376 7215880 7937468 8246720 9071392 9921835 11339240 11545408 13194752 14431760 15874936 16493440 18142784 19843670 22678480 23090816 26389504 28863520 31749872 32986880 36285568 39687340 45356960 46181632 52779008 57727040 63499744 65973760 72571136 79374680 90713920 92363264 105558016 115454080 126999488 131947520 145142272 158749360 181427840 184726528 211116032 230908160 253998976 263895040 290284544 317498720 362855680 369453056 461816320 507997952 527790080 580569088 634997440 725711360 738906112 923632640 1015995904 1055580160 1161138176 1269994880 1451422720 1477812224 1847265280 2031991808 2322276352 2539989760 2902845440 3694530560 4063983616 5079979520 5805690880 7389061120 8127967232 10159959040 11611381760 16255934464 20319918080 40639836160 81279672320
• Sum of all divisors σ(n): 243200261376
• Sum of proper divisors (its aliquot sum) s(n): 161920589056
• 81279672320 is an abundant number, because the sum of its proper divisors (161920589056) is greater than itself. Its abundance is 80640916736

Bases of 81279672320

• Binary: 1001011101100101001010110000000000000₂
• Hexadecimal: 0x12ECA56000
• Base-36: 11C7TGJK

Squares and roots of 81279672320

• 81279672320 squared (81279672320²) is 6606385132446574182400
• 81279672320 cubed (81279672320³) is 536964818784977349452043911168000
• The square root of 81279672320 is 285095.9002160501
• The cube root of 81279672320 is 4331.7227102047

Scales and comparisons

• 81,279,672,320 seconds is equal to 2,584 years, 22 weeks, 6 days, 22 hours, 45 minutes, 20 seconds.
• To count from 1 to 81,279,672,320 would take you about five thousand, one hundred sixty-eight 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 81279672320 cubic inches would be around 361 feet tall.

Recreational maths with 81279672320

• 81279672320 backwards is 02327697218
• The number of decimal digits it has is: 11
• The sum of 81279672320's digits is 47
• More coming soon!