81968721120

Names of 81968721120

• Cardinal: 81968721120 can be written as Eighty-one billion, nine hundred sixty-eight million, seven hundred twenty-one thousand, one hundred twenty.

Scientific notation

• Scientific notation: 8.196872112 × 10¹⁰

Factors of 81968721120

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 698

Divisors of 81968721120

• Number of divisors d(n): 1152
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 13 15 16 18 20 22 23 24 26 27 30 32 33 36 39 40 44 45 46 48 52 54 55 60 65 66 69 72 78 80 81 88 90 92 96 99 104 108 110 115 117 120 130 132 135 138 143 144 156 160 162 165 176 180 184 195 198 207 208 216 220 230 234 240 243 253 260 264 270 276 286 288 297 299 312 324 330 345 351 352 360 368 390 396 405 414 416 429 432 440 460 468 480 486 495 506 520 528 540 552 572 585 594 598 621 624 641 648 660 690 702 715 720 736 759 780 792 810 828 858 864 880 891 897 920 936 972 990 1012 1035 1040 1053 1056 1080 1104 1144 1170 1188 1196 1215 1242 1248 1265 1282 1287 1296 1320 1380 1404 1430 1440 1485 1495 1518 1560 1584 1620 1656 1716 1755 1760 1782 1794 1840 1863 1872 1923 1944 1980 2024 2070 2080 2106 2145 2160 2208 2277 2288 2340 2376 2392 2430 2484 2530 2564 2574 2592 2640 2673 2691 2760 2808 2860 2970 2990 3036 3105 3120 3159 3168 3205 3240 3289 3312 3432 3510 3564 3588 3680 3726 3744 3795 3846 3861 3888 3960 4048 4140 4212 4290 4320 4455 4485 4554 4576 4680 4752 4784 4860 4968 5060 5128 5148 5265 5280 5346 5382 5520 5589 5616 5720 5769 5940 5980 6072 6210 6240 6318 6410 6435 6480 6578 6624 6831 6864 7020 7051 7128 7176 7452 7590 7692 7722 7776 7920 8073 8096 8280 8333 8424 8580 8910 8970 9108 9315 9360 9504 9568 9615 9720 9867 9936 10120 10256 10296 10530 10692 10764 11040 11178 11232 11385 11440 11538 11583 11880 11960 12144 12420 12636 12820 12870 12960 13156 13365 13455 13662 13728 14040 14102 14256 14352 14743 14904 15180 15384 15444 15795 15840 16146 16445 16560 16666 16848 17160 17307 17820 17940 18216 18630 18720 19230 19305 19440 19734 19872 20240 20493 20512 20592 21060 21153 21384 21528 22356 22770 22880 23076 23166 23760 23920 24219 24288 24840 24999 25272 25640 25740 26312 26730 26910 27324 27945 28080 28204 28512 28704 28845 29486 29601 29808 30360 30768 30888 31590 32292 32890 33120 33332 33696 34155 34320 34614 34749 35255 35640 35880 36432 37260 38460 38610 38880 39468 40365 40480 40986 41184 41665 42120 42306 42768 43056 44229 44712 45540 46152 46332 47520 47840 48438 49335 49680 49998 50544 51280 51480 51921 52624 53460 53820 54648 55890 56160 56408 57690 57915 58972 59202 59616 60720 61479 61536 61776 63180 63459 64584 65780 66664 68310 68640 69228 69498 70510 71280 71760 72657 72864 73715 74520 74997 76920 77220 78936 80730 81972 83330 84240 84612 85536 86112 86535 88458 88803 89424 91080 91663 92304 92664 96876 98670 99360 99996 101088 102465 102560 102960 103842 105248 105765 106920 107640 109296 111780 112816 115380 115830 117944 118404 121095 121440 122958 123552 124995 126360 126918 129168 131560 132687 133328 136620 138456 138996 141020 142560 143520 145314 147430 148005 149040 149994 153840 154440 155763 157872 161460 162173 163944 166660 168480 169224 173070 173745 176916 177606 178848 182160 183326 184608 185328 190377 191659 193752 197340 199992 204930 205920 207684 211530 213840 215280 218592 221145 223560 224991 225632 230760 231660 235888 236808 242190 245916 249990 252720 253836 258336 259605 263120 265374 266409 266656 273240 274989 276912 277992 282040 290628 294860 296010 298080 299988 307395 307680 308880 311526 315744 317295 322920 324346 327888 333320 338448 346140 347490 353832 355212 363285 364320 366652 370656 374985 380754 383318 387504 394680 398061 399984 409860 415368 423060 427680 430560 442290 444015 447120 449982 458315 461520 463320 471776 473616 484380 486519 491832 499980 505440 507672 519210 526240 530748 532818 546480 549978 553824 555984 564080 571131 574977 581256 589720 592020 599976 614790 617760 623052 634590 645840 648692 655776 663435 666640 674973 676896 692280 694980 707664 710424 726570 733304 749970 761508 766636 775008 778815 789360 796122 799227 799968 810865 819720 824967 830736 846120 884580 888030 894240 899964 916630 923040 926640 947232 951885 958295 968760 973038 983664 999960 1015344 1038420 1061496 1065636 1092960 1099956 1111968 1124955 1128160 1142262 1149954 1162512 1179440 1184040 1194183 1199952 1229580 1246104 1269180 1291680 1297384 1326870 1332045 1333280 1349946 1374945 1384560 1389960 1415328 1420848 1453140 1459557 1466608 1499940 1523016 1533272 1557630 1578720 1592244 1598454 1621730 1639440 1649934 1661472 1692240 1713393 1724931 1769160 1776060 1799928 1833260 1853280 1903770 1916590 1937520 1946076 1967328 1990305 1999920 2024919 2030688 2076840 2108249 2122992 2131272 2199912 2249910 2284524 2299908 2325024 2358880 2368080 2388366 2399904 2432595 2459160 2474901 2492208 2538360 2594768 2653740 2664090 2699892 2749890 2769120 2779920 2841696 2855655 2874885 2906280 2919114 2933216 2999880 3046032 3066544 3115260 3184488 3196908 3243460 3278880 3299868 3374865 3384480 3426786 3449862 3538320 3552120 3582549 3599856 3666520 3807540 3833180 3875040 3892152 3980610 3996135 3999840 4049838 4124835 4153680 4216498 4245984 4262544 4378671 4399824 4499820 4569048 4599816 4736160 4776732 4865190 4918320 4949802 4984416 5076720 5174793 5189536 5307480 5328180 5399784 5499780 5559840 5711310 5749770 5812560 5838228 5970915 5999760 6092064 6133088 6230520 6324747 6368976 6393816 6486920 6599736 6749730 6853572 6899724 7076640 7104240 7165098 7199712 7297785 7333040 7424703 7615080 7666360 7784304 7961220 7992270 8099676 8249670 8307360 8432996 8525088 8566965 8624655 8757342 8799648 8999640 9138096 9199632 9553464 9730380 9836640 9899604 10124595 10153440 10349586 10541245 10614960 10656360 10799568 10999560 11422620 11499540 11625120 11676456 11941830 11999520 12374505 12461040 12649494 12737952 12787632 12973840 13136013 13199472 13499460 13707144 13799448 14208480 14330196 14595570 14666080 14849406 15230160 15332720 15524379 15568608 15922440 15984540 16199352 16499340 16865992 17133930 17249310 17514684 17912745 17999280 18276192 18399264 18974241 19106928 19460760 19799208 20249190 20699172 21082490 21229920 21312720 21599136 21893355 21999120 22274109 22845240 22999080 23352912 23883660 24749010 24922080 25298988 25575264 25873965 25947680 26272026 26398944 26998920 27414288 27598896 28660392 29191140 29698812 30460320 30665440 31048758 31623735 31844880 31969080 32398704 32998680 33731984 34267860 34498620 35029368 35825490 35998560 37123515 37948482 38213856 38921520 39408039 39598416 40498380 41398344 42164980 42625440 43786710 43998240 44548218 45690480 45998160 46573137 46705824 47767320 49498020 50597976 51747930 52544052 53997840 54828576 55197792 56922723 57320784 58382280 59397624 62097516 63247470 63689760 63938160 64797408 65680065 65997360 67463968 68535720 68997240 70058736 71650980 74247030 75896964 77621895 77843040 78816078 79196832 80996760 82796688 84329960 87573420 89096436 91380960 91996320 93146274 94871205 95534640 98996040 101195952 103495860 105088104 107995680 111370545 113845446 114641568 116764560 118795248 124195032 126494940 127876320 131360130 131994720 137071440 137994480 140117472 143301960 148494060 151793928 155243790 157632156 161993520 165593376 168659920 170768169 175146840 178192872 186292548 189742410 191069280 197040195 197992080 202391904 206991720 210176208 222741090 227690892 232865685 233529120 237590496 248390064 252989880 262720260 274142880 275988960 284613615 286603920 296988120 303587856 310487580 315264312 323987040 337319840 341536338 350293680 356385744 372585096 379484820 394080390 395984160 413983440 420352416 445482180 455381784 465731370 496780128 505979760 512304507 525440520 569227230 573207840 593976240 607175712 620975160 630528624 683072676 700587360 712771488 745170192 758969640 788160780 827966880 853840845 890964360 910763568 931462740 1011959520 1024609014 1050881040 1138454460 1187952480 1241950320 1261057248 1366145352 1490340384 1517939280 1576321560 1707681690 1781928720 1821527136 1862925480 2049218028 2101762080 2276908920 2483900640 2561522535 2732290704 3035878560 3152643120 3415363380 3563857440 3725850960 4098436056 4553817840 5123045070 5464581408 6305286240 6830726760 7451701920 8196872112 9107635680 10246090140 13661453520 16393744224 20492180280 27322907040 40984360560 81968721120
• Sum of all divisors σ(n): 356162946048
• Sum of proper divisors (its aliquot sum) s(n): 274194224928
• 81968721120 is an abundant number, because the sum of its proper divisors (274194224928) is greater than itself. Its abundance is 192225503808

Bases of 81968721120

• Binary: 1001100010101101101110110110011100000₂
• Hexadecimal: 0x1315B76CE0
• Base-36: 11NM2600

Squares and roots of 81968721120

• 81968721120 squared (81968721120²) is 6718871242048334054400
• 81968721120 cubed (81968721120³) is 550737283080647911665712508928000
• The square root of 81968721120 is 286301.8007627615
• The cube root of 81968721120 is 4343.9290150483

Scales and comparisons

• 81,968,721,120 seconds is equal to 2,606 years, 18 weeks, 2 days, 1 hour, 12 minutes.
• To count from 1 to 81,968,721,120 would take you about five thousand, two hundred twelve 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 81968721120 cubic inches would be around 362 feet tall.

Recreational maths with 81968721120

• 81968721120 backwards is 02112786918
• 81968721120 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81968721120's digits is 45
• More coming soon!