81319230720

Names of 81319230720

• Cardinal: 81319230720 can be written as Eighty-one billion, three hundred nineteen million, two hundred thirty thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.131923072 × 10¹⁰

Factors of 81319230720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 19
• Sum of prime factors: 47

Divisors of 81319230720

• Number of divisors d(n): 1728
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 20 21 24 26 27 28 30 32 34 35 36 39 40 42 45 48 51 52 54 56 60 63 64 65 68 70 72 78 80 81 84 85 90 91 96 102 104 105 108 112 117 119 120 126 128 130 135 136 140 144 153 156 160 162 168 169 170 180 182 189 192 195 204 208 210 216 221 224 234 238 240 243 252 255 256 260 270 272 273 280 288 306 312 315 320 324 336 338 340 351 357 360 364 378 384 390 405 408 416 420 432 442 448 455 459 468 476 480 486 504 507 510 520 540 544 546 560 567 576 585 595 612 624 630 640 648 663 672 676 680 702 714 720 728 756 765 768 780 810 816 819 832 840 845 864 884 896 910 918 936 945 952 960 972 1008 1014 1020 1040 1053 1071 1080 1088 1092 1105 1120 1134 1152 1170 1183 1190 1215 1224 1248 1260 1280 1296 1326 1344 1352 1360 1365 1377 1404 1428 1440 1456 1512 1521 1530 1547 1560 1620 1632 1638 1664 1680 1690 1701 1728 1755 1768 1785 1792 1820 1836 1872 1890 1904 1920 1944 1989 2016 2028 2040 2080 2106 2142 2160 2176 2184 2197 2210 2240 2268 2295 2304 2340 2366 2380 2430 2448 2457 2496 2520 2535 2592 2652 2688 2704 2720 2730 2754 2808 2835 2856 2873 2880 2912 3024 3042 3060 3094 3120 3159 3213 3240 3264 3276 3315 3328 3360 3380 3402 3456 3510 3536 3549 3570 3640 3672 3744 3780 3808 3840 3888 3978 4032 4056 4080 4095 4131 4160 4212 4284 4320 4352 4368 4394 4420 4480 4536 4563 4590 4641 4680 4732 4760 4860 4896 4914 4992 5040 5070 5184 5265 5304 5355 5376 5408 5440 5460 5508 5616 5670 5712 5746 5760 5824 5915 5967 6048 6084 6120 6188 6240 6318 6426 6480 6528 6552 6591 6630 6720 6760 6804 6885 6912 7020 7072 7098 7140 7280 7344 7371 7488 7560 7605 7616 7735 7776 7956 8064 8112 8160 8190 8262 8320 8424 8505 8568 8619 8640 8736 8788 8840 8960 9072 9126 9180 9282 9360 9464 9520 9639 9720 9792 9828 9945 9984 10080 10140 10368 10530 10608 10647 10710 10816 10880 10920 10985 11016 11232 11340 11424 11492 11520 11648 11830 11934 12096 12168 12240 12285 12376 12480 12636 12852 12960 13056 13104 13182 13260 13440 13520 13608 13689 13770 13923 14040 14144 14196 14280 14365 14560 14688 14742 14976 15120 15210 15232 15379 15470 15552 15795 15912 16065 16128 16224 16320 16380 16524 16640 16848 17010 17136 17238 17280 17472 17576 17680 17745 17901 18144 18252 18360 18564 18720 18928 19040 19278 19440 19584 19656 19773 19890 20111 20160 20280 20655 20736 21060 21216 21294 21420 21632 21760 21840 21970 22032 22113 22464 22680 22815 22848 22984 23205 23296 23660 23868 24192 24336 24480 24570 24752 24960 25272 25704 25857 25920 26208 26364 26520 26880 27040 27216 27378 27540 27846 28080 28288 28392 28560 28730 28917 29120 29376 29484 29835 29952 30240 30420 30464 30758 30940 31104 31590 31824 31941 32130 32448 32640 32760 32955 33048 33696 34020 34272 34476 34560 34944 35152 35360 35490 35802 36288 36504 36720 36855 37128 37349 37440 37856 38080 38556 38880 39168 39312 39546 39780 40222 40320 40560 41067 41310 41769 42120 42432 42588 42840 43095 43264 43680 43940 44064 44226 44928 45360 45630 45696 45968 46137 46410 47320 47736 48195 48384 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265749120 282358440 290425824 297872640 298967760 301182336 312766272 317653245 318898944 322695360 334647040 338830128 341677440 347518080 363032280 367960320 376477920 387234432 390957840 398623680 417021696 423537660 430260480 446808960 451773504 478348416 481178880 484043040 501970560 508245192 521277120 531498240 564716880 580851648 597935520 602364672 625532544 635306490 645390720 677660256 683354880 695036160 726064560 752955840 774468864 781915680 797247360 847075320 893617920 903547008 956696832 968086080 1003941120 1016490384 1042554240 1129433760 1161703296 1195871040 1251065088 1270612980 1290781440 1355320512 1452129120 1505911680 1563831360 1594494720 1694150640 1807094016 1936172160 2032980768 2085108480 2258867520 2323406592 2391742080 2541225960 2710641024 2904258240 3011823360 3127662720 3388301280 3872344320 4065961536 4517735040 4783484160 5082451920 5421282048 5808516480 6255325440 6776602560 8131923072 9035470080 10164903840 11617032960 13553205120 16263846144 20329807680 27106410240 40659615360 81319230720
• Sum of all divisors σ(n): 382483745280
• Sum of proper divisors (its aliquot sum) s(n): 301164514560
• 81319230720 is an abundant number, because the sum of its proper divisors (301164514560) is greater than itself. Its abundance is 219845283840

Bases of 81319230720

• Binary: 1001011101111000000001111110100000000₂
• Hexadecimal: 0x12EF00FD00
• Base-36: 11CVDC00

Squares and roots of 81319230720

• 81319230720 squared (81319230720²) is 6612817284892591718400
• 81319230720 cubed (81319230720³) is 537749214499384636367330869248000
• The square root of 81319230720 is 285165.2691335325
• The cube root of 81319230720 is 4332.4253386435

Scales and comparisons

• 81,319,230,720 seconds is equal to 2,585 years, 36 weeks, 2 days, 19 hours, 12 minutes.
• To count from 1 to 81,319,230,720 would take you about five thousand, one hundred seventy-one 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 81319230720 cubic inches would be around 361 feet tall.

Recreational maths with 81319230720

• 81319230720 backwards is 02703291318
• 81319230720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81319230720's digits is 36
• More coming soon!