81020371824

Names of 81020371824

• Cardinal: 81020371824 can be written as Eighty-one billion, twenty million, three hundred seventy-one thousand, eight hundred twenty-four.

Scientific notation

• Scientific notation: 8.1020371824 × 10¹⁰

Factors of 81020371824

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 860

Divisors of 81020371824

• Number of divisors d(n): 540
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 19 21 24 27 28 36 38 42 48 49 54 56 57 63 72 76 81 84 98 108 112 114 126 133 144 147 152 162 168 171 189 196 216 228 243 252 266 294 304 324 336 342 378 392 399 432 441 456 486 504 513 532 567 588 648 684 729 756 784 798 829 882 912 931 972 1008 1026 1064 1134 1176 1197 1296 1323 1368 1458 1512 1539 1596 1658 1701 1764 1862 1944 2052 2128 2187 2268 2352 2394 2487 2646 2736 2793 2916 3024 3078 3192 3316 3402 3528 3591 3724 3888 3969 4104 4374 4536 4617 4788 4974 5103 5292 5586 5803 5832 6156 6384 6561 6632 6804 7056 7182 7448 7461 7938 8208 8379 8748 9072 9234 9576 9948 10206 10584 10773 11172 11606 11664 11907 12312 13122 13264 13608 13851 14364 14896 14922 15309 15751 15876 16758 17409 17496 18468 19152 19896 20412 21168 21546 22344 22383 23212 23814 24624 25137 26244 27216 27702 28728 29844 30618 31502 31752 32319 33516 34818 34992 35721 36936 39792 40621 40824 41553 43092 44688 44766 45927 46424 47253 47628 50274 52227 52488 55404 57456 59688 61236 63004 63504 64638 67032 67149 69636 71442 73872 75411 81242 81648 83106 86184 89532 91854 92848 94506 95256 96957 100548 104454 104976 107163 110257 110808 119376 121863 122472 124659 126008 129276 134064 134298 139272 141759 142884 150822 156681 162484 166212 172368 179064 183708 189012 190512 193914 201096 201447 208908 214326 220514 221616 226233 243726 244944 249318 252016 258552 268596 278544 283518 285768 290871 301644 313362 321489 324968 330771 332424 358128 365589 367416 378024 387828 402192 402894 417816 425277 428652 441028 452466 470043 487452 498636 517104 537192 567036 571536 581742 603288 604341 626724 642978 649936 661542 664848 678699 731178 734832 756048 771799 775656 805788 835632 850554 857304 872613 882056 904932 940086 974904 992313 997272 1074384 1096767 1134072 1163484 1206576 1208682 1253448 1275831 1285956 1323084 1357398 1410129 1462356 1543598 1551312 1611576 1701108 1714608 1745226 1764112 1809864 1813023 1880172 1949808 1984626 1994544 2036097 2193534 2268144 2315397 2326968 2417364 2506896 2551662 2571912 2646168 2714796 2820258 2924712 2976939 3087196 3223152 3290301 3402216 3490452 3619728 3626046 3760344 3827493 3969252 4072194 4230387 4387068 4630794 4653936 4834728 5103324 5143824 5292336 5429592 5439069 5640516 5849424 5953878 6108291 6174392 6580602 6804432 6946191 6980904 7252092 7520688 7654986 7938504 8144388 8460774 8774136 8930817 9261588 9669456 9870903 10206648 10859184 10878138 11281032 11482479 11907756 12216582 12348784 12691161 13161204 13892382 13961808 14504184 15309972 15877008 16288776 16921548 17548272 17861634 18523176 19741806 20413296 20838573 21756276 22562064 22964958 23815512 24433164 25382322 26322408 26792451 27784764 29008368 29612709 30619944 32577552 33843096 34447437 35723268 37046352 38073483 39483612 41677146 43512552 45929916 47631024 48866328 50764644 52644816 53584902 55569528 59225418 61239888 62515719 67686192 68894874 71446536 76146966 78967224 80377353 83354292 87025104 88838127 91859832 97732656 101529288 103342311 107169804 111139056 118450836 125031438 137789748 142893072 152293932 157934448 160754706 166708584 177676254 183719664 187547157 203058576 206684622 214339608 236901672 241132059 250062876 266514381 275579496 304587864 321509412 333417168 355352508 375094314 413369244 428679216 473803344 482264118 500125752 533028762 551158992 562641471 609175728 643018824 710705016 723396177 750188628 826738488 964528236 1000251504 1066057524 1125282942 1286037648 1421410032 1446792354 1500377256 1653476976 1687924413 1929056472 2132115048 2250565884 2893584708 3000754512 3375848826 3858112944 4264230096 4501131768 5063773239 5787169416 6751697652 9002263536 10127546478 11574338832 13503395304 20255092956 27006790608 40510185912 81020371824
• Sum of all divisors σ(n): 288658180200
• Sum of proper divisors (its aliquot sum) s(n): 207637808376
• 81020371824 is an abundant number, because the sum of its proper divisors (207637808376) is greater than itself. Its abundance is 126617436552

Bases of 81020371824

• Binary: 1001011011101001100001100001101110000₂
• Hexadecimal: 0x12DD30C370
• Base-36: 117XFR00

Squares and roots of 81020371824

• 81020371824 squared (81020371824²) is 6564300650499213086976
• 81020371824 cubed (81020371824³) is 531842079467971315526202371764224
• The square root of 81020371824 is 284640.7768117559
• The cube root of 81020371824 is 4327.1114120529

Scales and comparisons

• 81,020,371,824 seconds is equal to 2,576 years, 10 weeks, 1 day, 18 hours, 50 minutes, 24 seconds.
• To count from 1 to 81,020,371,824 would take you about five thousand, one hundred fifty-two 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 81020371824 cubic inches would be around 360.6 feet tall.

Recreational maths with 81020371824

• 81020371824 backwards is 42817302018
• 81020371824 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81020371824's digits is 36
• More coming soon!