81149973840

Names of 81149973840

• Cardinal: 81149973840 can be written as Eighty-one billion, one hundred forty-nine million, nine hundred seventy-three thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.114997384 × 10¹⁰

Factors of 81149973840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 113

Divisors of 81149973840

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 29 30 36 39 40 45 48 52 58 60 61 65 72 78 80 87 90 104 116 117 120 122 130 144 145 156 169 174 180 183 195 208 232 234 240 244 260 261 290 305 312 338 348 360 366 377 390 435 464 468 488 507 520 522 549 580 585 610 624 676 696 720 732 754 780 793 841 845 870 915 936 976 1014 1040 1044 1098 1131 1160 1170 1220 1305 1352 1392 1464 1508 1521 1560 1586 1682 1690 1740 1769 1830 1872 1885 2028 2088 2196 2197 2262 2320 2340 2379 2440 2523 2535 2610 2704 2745 2928 3016 3042 3120 3172 3364 3380 3393 3480 3538 3660 3770 3965 4056 4176 4205 4392 4394 4524 4680 4758 4880 4901 5046 5070 5220 5307 5490 5655 6032 6084 6344 6591 6728 6760 6786 6960 7076 7137 7320 7540 7569 7605 7930 8112 8410 8784 8788 8845 9048 9360 9516 9802 10092 10140 10309 10440 10614 10933 10980 10985 11310 11895 12168 12615 12688 13182 13456 13520 13572 14152 14274 14640 14703 15080 15138 15210 15860 15921 16820 16965 17576 17690 18096 19032 19604 19773 20184 20280 20618 20880 21228 21866 21960 21970 22620 22997 23790 24336 24505 25230 26364 26535 27144 28304 28548 29406 30160 30276 30420 30927 31720 31842 32799 32955 33640 33930 35152 35380 35685 37845 38064 39208 39546 40368 40560 41236 42456 43732 43920 43940 44109 45240 45994 47580 49010 50460 51301 51545 52728 53070 54288 54665 57096 58812 60552 60840 61854 63440 63684 63713 65598 65910 67280 67860 68991 70760 71370 73515 75690 78416 79092 79605 82472 84912 87464 87880 88218 90480 91988 92781 95160 98020 98397 98865 100920 102602 103090 105456 106140 109330 114192 114985 117624 121104 121680 123708 127368 127426 131196 131820 134017 135720 137982 141520 142129 142740 147030 151380 153903 154635 158184 159210 163995 164944 174928 175760 176436 183976 185562 190320 191139 196040 196794 197730 201840 205204 206180 206973 212280 218660 220545 229970 235248 247416 254736 254852 256505 262392 263640 268034 271440 275964 284258 285480 294060 298961 302760 307806 309270 316368 318420 318565 327990 344955 352872 367952 371124 382278 392080 393588 395460 402051 410408 412360 413946 424560 426387 437320 441090 459940 461709 463905 491985 494832 509704 513010 524784 527280 536068 551928 568516 570960 573417 588120 597922 605520 615612 618540 636840 637130 655980 666913 670085 689910 705744 710645 742248 764556 769515 787176 790920 804102 820816 824720 827892 852774 874640 882180 896883 919880 923418 927810 955695 983970 1019408 1026020 1034865 1072136 1103856 1137032 1146834 1176240 1195844 1206153 1231224 1237080 1273680 1274260 1279161 1311960 1333826 1340170 1379820 1421290 1484496 1494805 1529112 1539030 1574352 1581840 1608204 1655784 1705548 1764360 1793766 1839760 1846836 1847677 1855620 1911390 1967940 2000739 2010255 2052040 2069730 2131935 2144272 2274064 2293668 2308545 2391688 2412306 2462448 2474160 2548520 2558322 2623920 2667652 2680340 2690649 2759640 2842580 2867085 2989610 3058224 3078060 3216408 3311568 3334565 3411096 3528720 3587532 3693672 3695354 3711240 3822780 3886493 3935880 4001478 4020510 4104080 4139460 4263870 4484415 4587336 4617090 4783376 4824612 5097040 5116644 5335304 5360680 5381298 5519280 5543031 5685160 5734170 5979220 6002217 6030765 6156120 6395805 6432816 6669130 6822192 7175064 7387344 7390708 7422480 7645560 7772986 7871760 8002956 8041020 8278920 8527740 8669869 8968830 9174672 9234180 9238385 9649224 10003695 10233288 10670608 10721360 10762596 11086062 11370320 11468340 11659479 11958440 12004434 12061530 12312240 12791610 13338260 13453245 14350128 14781416 15291120 15545972 16005912 16082040 16557840 16629093 17055480 17339738 17937660 18468360 18476770 19298448 19432465 20007390 20466576 21525192 22172124 22936680 23318958 23916880 24008868 24123060 25583220 26009607 26676520 26906490 27715155 29562832 30011085 31091944 32011824 32164080 33258186 34110960 34679476 34978437 35875320 36936720 36953540 38864930 40014780 43050384 43349345 44344248 45873360 46637916 48017736 48246120 51166440 52019214 53353040 53812980 55430310 58297395 60022170 62183888 66516372 69358952 69956874 71750640 73907080 77729860 78028821 80029560 83145465 86698690 88688496 93275832 96035472 96492240 102332880 104038428 107625960 110860620 112708297 116594790 120044340 130048035 133032744 138717904 139913748 147814160 155459720 156057642 160059120 166290930 173397380 174892185 186551664 208076856 215251920 221721240 225416594 233189580 240088680 260096070 266065488 279827496 310919440 312115284 332581860 338124891 346794760 349784370 390144105 416153712 443442480 450833188 466379160 480177360 520192140 559654992 563541485 624230568 665163720 676249782 693589520 699568740 780288210 901666376 932758320 1014374673 1040384280 1127082970 1248461136 1330327440 1352499564 1399137480 1560576420 1690624455 1803332752 2028749346 2080768560 2254165940 2704999128 2798274960 3121152840 3381248910 4057498692 4508331880 5071873365 5409998256 6242305680 6762497820 8114997384 9016663760 10143746730 13524995640 16229994768 20287493460 27049991280 40574986920 81149973840
• Sum of all divisors σ(n): 310772869680
• Sum of proper divisors (its aliquot sum) s(n): 229622895840
• 81149973840 is an abundant number, because the sum of its proper divisors (229622895840) is greater than itself. Its abundance is 148472922000

Bases of 81149973840

• Binary: 1001011100100111010100101010101010000₂
• Hexadecimal: 0x12E4EA5550
• Base-36: 11A2LKK0

Squares and roots of 81149973840

• 81149973840 squared (81149973840²) is 6585318254232684345600
• 81149973840 cubed (81149973840³) is 534398404059056803918417519104000
• The square root of 81149973840 is 284868.3447489383
• The cube root of 81149973840 is 4329.4174312729

Scales and comparisons

• 81,149,973,840 seconds is equal to 2,580 years, 16 weeks, 3 days, 19 hours, 24 minutes.
• To count from 1 to 81,149,973,840 would take you about five thousand, one hundred sixty 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 81149973840 cubic inches would be around 360.8 feet tall.

Recreational maths with 81149973840

• 81149973840 backwards is 04837994118
• The number of decimal digits it has is: 11
• The sum of 81149973840's digits is 54
• More coming soon!