81977811918912

Names of 81977811918912

• Cardinal: 81977811918912 can be written as Eighty-one trillion, nine hundred seventy-seven billion, eight hundred eleven million, nine hundred eighteen thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 8.1977811918912 × 10¹³

Factors of 81977811918912

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 1563

Divisors of 81977811918912

• Number of divisors d(n): 672
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 13 14 16 18 21 24 26 27 28 32 36 39 42 48 52 54 56 63 64 72 78 84 91 96 104 108 112 117 126 144 156 168 182 189 192 208 216 224 234 252 273 288 312 336 351 364 378 409 416 432 448 468 504 546 576 624 672 702 728 756 818 819 832 864 936 1008 1092 1129 1227 1248 1344 1404 1456 1512 1636 1638 1728 1872 2016 2184 2258 2454 2457 2496 2808 2863 2912 3024 3272 3276 3387 3681 3744 4032 4368 4516 4908 4914 5317 5616 5726 5824 6048 6544 6552 6774 7362 7488 7903 8589 8736 9032 9816 9828 10161 10634 11043 11232 11452 12096 13088 13104 13548 14677 14724 15806 15951 17178 17472 18064 19632 19656 20322 21268 22086 22464 22904 23709 25767 26176 26208 27096 29354 29448 30483 31612 31902 34356 36128 37219 39264 39312 40644 42536 44031 44172 45808 47418 47853 51534 52416 54192 58708 58896 60966 63224 63804 68712 71127 72256 74438 77301 78528 78624 81288 85072 88062 88344 91616 94836 95706 102739 103068 108384 111657 117416 117792 121932 126448 127608 132093 137424 142254 143559 148876 154602 157248 162576 170144 176124 176688 183232 189672 191412 205478 206136 213381 216768 223314 234832 235584 243864 252896 255216 264186 274848 284508 287118 297752 308217 309204 325152 334971 340288 352248 353376 379344 382824 396279 410956 412272 426762 446628 461761 469664 487728 505792 510432 528372 549696 569016 574236 595504 616434 618408 650304 669942 704496 706752 758688 765648 792558 821912 824544 853524 893256 923522 924651 939328 975456 1004913 1020864 1056744 1138032 1148472 1191008 1232868 1236816 1274641 1339884 1385283 1408992 1517376 1531296 1585116 1643824 1649088 1707048 1786512 1847044 1849302 1950912 2009826 2113488 2276064 2296944 2382016 2465736 2473632 2549282 2679768 2770566 2773953 2817984 3062592 3170232 3232327 3287648 3414096 3573024 3694088 3698604 3823923 4019652 4155849 4226976 4552128 4593888 4931472 4947264 5098564 5359536 5541132 5547906 6002893 6340464 6464654 6575296 6828192 7146048 7388176 7397208 7647846 8039304 8311698 8453952 8922487 9187776 9696981 9862944 10197128 10719072 11082264 11095812 11471769 12005786 12467547 12680928 12929308 13656384 14776352 14794416 15295692 16078608 16570333 16623396 17844974 18008679 19393962 19725888 20394256 21438144 22164528 22191624 22943538 24011572 24935094 25361856 25858616 26767461 29090943 29552704 29588832 30591384 32157216 33140666 33246792 34415307 35689948 36017358 38787924 40788512 42020251 44329056 44383248 45887076 48023144 49710999 49870188 51717232 53534922 54026037 58181886 59177664 61182768 64314432 66281332 66493584 68830614 71379896 72034716 77575848 80302383 81577024 84040502 87272829 88658112 88766496 91774152 96046288 99421998 99740376 103434464 107069844 108052074 115992331 116363772 122365536 126060753 132562664 132987168 137661228 142759792 144069432 149132997 155151696 160604766 162078111 168081004 174545658 177532992 183548304 192092576 198843996 199480752 206868928 214139688 216104148 231984662 232727544 240907149 244731072 252121506 265125328 265974336 275322456 285519584 288138864 298265994 310303392 321209532 324156222 336162008 347976993 349091316 367096608 378182259 384185152 397687992 398961504 428279376 432208296 447398991 463969324 465455088 481814298 504243012 521328169 530250656 550644912 571039168 576277728 596531988 620606784 642419064 648312444 672324016 695953986 698182632 734193216 756364518 795375984 797923008 856558752 864416592 894797982 927938648 930910176 963628596 1008486024 1042656338 1043930979 1060501312 1101289824 1134546777 1152555456 1193063976 1284838128 1296624888 1344648032 1391907972 1396365264 1512729036 1563984507 1590751968 1713117504 1728833184 1789595964 1855877296 1861820352 1927257192 2016972048 2085312676 2087861958 2202579648 2269093554 2386127952 2569676256 2593249776 2689296064 2783815944 2792730528 3025458072 3127969014 3131792937 3181503936 3457666368 3579191928 3649297183 3711754592 3854514384 4033944096 4170625352 4175723916 4538187108 4691953521 4772255904 5139352512 5186499552 5567631888 5585461056 6050916144 6255938028 6263585874 6777266197 7158383856 7298594366 7423509184 7709028768 8067888192 8341250704 8351447832 9076374216 9383907042 9544511808 10372999104 10947891549 11135263776 12101832288 12511876056 12527171748 13554532394 14075860563 14316767712 14597188732 15418057536 16682501408 16702895664 18152748432 18767814084 20331798591 21895783098 22270527552 24203664576 25023752112 25054343496 27109064788 28151721126 28633535424 29194377464 32843674647 33365002816 33405791328 36305496864 37535628168 40663597182 43791566196 47440863379 50047504224 50108686992 54218129576 56303442252 58388754928 60995395773 65687349294 66811582656 72610993728 75071256336 81327194364 87583132392 94881726758 98531023941 100095008448 100217373984 108436259152 112606884504 116777509856 121990791546 131374698588 142322590137 150142512672 162654388728 175166264784 182986187319 189763453516 197062047882 200434747968 216872518304 225213769008 233555019712 243981583092 262749397176 284645180274 300285025344 325308777456 350332529568 365972374638 379526907032 394124095764 426967770411 433745036608 450427538016 487963166184 525498794352 569290360548 650617554912 700665059136 731944749276 759053814064 788248191528 853935540822 900855076032 975926332368 1050997588704 1138580721096 1280903311233 1301235109824 1463889498552 1518107628128 1576496383056 1707871081644 1951852664736 2101995177408 2277161442192 2561806622466 2927778997104 3036215256256 3152992766112 3415742163288 3903705329472 4554322884384 5123613244932 5855557994208 6305985532224 6831484326576 9108645768768 10247226489864 11711115988416 13662968653152 20494452979728 27325937306304 40988905959456 81977811918912
• Sum of all divisors σ(n): 297603693945600
• Sum of proper divisors (its aliquot sum) s(n): 215625882026688
• 81977811918912 is an abundant number, because the sum of its proper divisors (215625882026688) is greater than itself. Its abundance is 133648070107776

Bases of 81977811918912

• Binary: 10010101000111011110010010110111110000001000000₂
• Hexadecimal: 0x4A8EF25BE040
• Base-36: T2434M1C0

Squares and roots of 81977811918912

• 81977811918912 squared (81977811918912²) is 6720361647012510367663263744
• 81977811918912 cubed (81977811918912³) is 550920543125861251335399473818969397526528
• The square root of 81977811918912 is 9054159.9234226033
• The cube root of 81977811918912 is 43440.8959795051

Scales and comparisons

• 81,977,811,918,912 seconds is equal to 2,606,640 years, 43 weeks, 6 days, 13 hours, 55 minutes, 12 seconds.
• To count from 1 to 81,977,811,918,912 would take you about six million, five hundred sixteen thousand, six hundred 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 81977811918912 cubic inches would be around 3620.1 feet tall.

Recreational maths with 81977811918912

• 81977811918912 backwards is 21981911877918
• 81977811918912 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81977811918912's digits is 72
• More coming soon!