81273937920

Names of 81273937920

• Cardinal: 81273937920 can be written as Eighty-one billion, two hundred seventy-three million, nine hundred thirty-seven thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.127393792 × 10¹⁰

Factors of 81273937920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 5009

Divisors of 81273937920

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 16 19 20 21 24 28 30 32 35 38 40 42 48 56 57 60 64 70 76 80 84 95 96 105 112 114 120 128 133 140 152 160 168 190 192 210 224 228 240 256 266 280 285 304 320 336 380 384 399 420 448 456 480 512 532 560 570 608 640 665 672 760 768 798 840 896 912 960 1024 1064 1120 1140 1216 1280 1330 1344 1520 1536 1596 1680 1792 1824 1920 1995 2048 2128 2240 2280 2432 2560 2660 2688 3040 3072 3192 3360 3584 3648 3840 3990 4096 4256 4480 4560 4864 4973 5120 5320 5376 6080 6144 6384 6720 7168 7296 7680 7980 8192 8512 8960 9120 9728 9946 10240 10640 10752 12160 12288 12768 13440 14336 14592 14919 15360 15960 17024 17920 18240 19456 19892 20480 21280 21504 24320 24576 24865 25536 26880 28672 29184 29838 30720 31920 34048 34811 35840 36480 38912 39784 40960 42560 43008 48640 49730 51072 53760 57344 58368 59676 61440 63840 68096 69622 71680 72960 74595 77824 79568 85120 86016 94487 97280 99460 102144 104433 107520 116736 119352 122880 127680 136192 139244 143360 145920 149190 155648 159136 170240 172032 174055 188974 194560 198920 204288 208866 215040 233472 238704 255360 272384 278488 283461 286720 291840 298380 318272 340480 348110 377948 389120 397840 408576 417732 430080 466944 472435 477408 510720 522165 544768 556976 566922 583680 596760 636544 661409 680960 696220 755896 778240 795680 817152 835464 860160 944870 954816 1021440 1044330 1089536 1113952 1133844 1167360 1193520 1273088 1322818 1361920 1392440 1417305 1511792 1591360 1634304 1670928 1889740 1909632 1984227 2042880 2088660 2227904 2267688 2334720 2387040 2546176 2645636 2723840 2784880 2834610 3023584 3182720 3268608 3307045 3341856 3779480 3819264 3968454 4085760 4177320 4455808 4535376 4774080 5092352 5291272 5447680 5569760 5669220 6047168 6365440 6614090 6683712 7558960 7638528 7936908 8171520 8354640 8911616 9070752 9548160 9921135 10184704 10582544 11139520 11338440 12094336 12730880 13228180 13367424 15117920 15277056 15873816 16343040 16709280 17823232 18141504 19096320 19842270 20369408 21165088 22279040 22676880 24188672 25461760 26456360 26734848 30235840 30554112 31747632 33418560 35646464 36283008 38192640 39684540 40738816 42330176 44558080 45353760 48377344 50923520 52912720 53469696 60471680 61108224 63495264 66837120 71292928 72566016 76385280 79369080 84660352 89116160 90707520 96754688 101847040 105825440 106939392 120943360 122216448 126990528 133674240 142585856 145132032 152770560 158738160 169320704 178232320 181415040 193509376 203694080 211650880 213878784 241886720 253981056 267348480 285171712 290264064 305541120 317476320 338641408 356464640 362830080 387018752 423301760 427757568 483773440 507962112 534696960 580528128 611082240 634952640 677282816 712929280 725660160 774037504 846603520 855515136 967546880 1015924224 1069393920 1161056256 1269905280 1354565632 1425858560 1451320320 1693207040 1935093760 2031848448 2138787840 2322112512 2539810560 2709131264 2902640640 3386414080 3870187520 4063696896 4277575680 5079621120 5418262528 5805281280 6772828160 8127393792 10159242240 11610562560 13545656320 16254787584 20318484480 27091312640 40636968960 81273937920
• Sum of all divisors σ(n): 312917921280
• Sum of proper divisors (its aliquot sum) s(n): 231643983360
• 81273937920 is an abundant number, because the sum of its proper divisors (231643983360) is greater than itself. Its abundance is 150370045440

Bases of 81273937920

• Binary: 1001011101100010011011110000000000000₂
• Hexadecimal: 0x12EC4DE000
• Base-36: 11C4EJUO

Squares and roots of 81273937920

• 81273937920 squared (81273937920²) is 6605452985024013926400
• 81273937920 cubed (81273937920³) is 536851175838320397563449049088000
• The square root of 81273937920 is 285085.8430718719
• The cube root of 81273937920 is 4331.6208380137

Scales and comparisons

• 81,273,937,920 seconds is equal to 2,584 years, 13 weeks, 3 days, 13 hours, 52 minutes.
• To count from 1 to 81,273,937,920 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 81273937920 cubic inches would be around 361 feet tall.

Recreational maths with 81273937920

• 81273937920 backwards is 02973937218
• The number of decimal digits it has is: 11
• The sum of 81273937920's digits is 51
• More coming soon!