81997587887040

Names of 81997587887040

• Cardinal: 81997587887040 can be written as Eighty-one trillion, nine hundred ninety-seven billion, five hundred eighty-seven million, eight hundred eighty-seven thousand and forty.

Scientific notation

• Scientific notation: 8.199758788704 × 10¹³

Factors of 81997587887040

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 4656

Divisors of 81997587887040

• Number of divisors d(n): 756
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 32 35 36 40 42 45 48 49 54 56 60 63 64 70 72 80 81 84 90 96 98 105 108 112 120 126 135 140 144 147 160 162 168 180 189 192 196 210 216 224 240 243 245 252 270 280 288 294 315 320 324 336 360 378 392 405 420 432 441 448 480 486 490 504 540 560 567 576 588 630 648 672 720 735 756 784 810 840 864 882 945 960 972 980 1008 1080 1120 1134 1176 1215 1260 1296 1323 1344 1440 1470 1512 1568 1620 1680 1701 1728 1764 1890 1944 1960 2016 2160 2205 2240 2268 2352 2430 2520 2592 2646 2835 2880 2940 3024 3136 3240 3360 3402 3528 3780 3888 3920 3969 4032 4320 4410 4536 4639 4704 4860 5040 5184 5292 5670 5880 6048 6480 6615 6720 6804 7056 7560 7776 7840 7938 8505 8640 8820 9072 9278 9408 9720 10080 10584 11340 11760 11907 12096 12960 13230 13608 13917 14112 15120 15552 15680 15876 17010 17640 18144 18556 19440 19845 20160 21168 22680 23195 23520 23814 25920 26460 27216 27834 28224 30240 31752 32473 34020 35280 36288 37112 38880 39690 41751 42336 45360 46390 47040 47628 52920 54432 55668 59535 60480 63504 64946 68040 69585 70560 74224 77760 79380 83502 84672 90720 92780 95256 97419 105840 108864 111336 119070 125253 127008 129892 136080 139170 141120 148448 158760 162365 167004 181440 185560 190512 194838 208755 211680 222672 227311 238140 250506 254016 259784 272160 278340 292257 296896 317520 324730 334008 371120 375759 381024 389676 417510 423360 445344 454622 476280 487095 501012 519568 544320 556680 584514 626265 635040 649460 668016 681933 742240 751518 762048 779352 835020 876771 890688 909244 952560 974190 1002024 1039136 1113360 1127277 1136555 1169028 1252530 1270080 1298920 1336032 1363866 1461285 1484480 1503036 1558704 1670040 1753542 1818488 1878795 1905120 1948380 2004048 2045799 2078272 2226720 2254554 2273110 2338056 2505060 2597840 2630313 2672064 2727732 2922570 3006072 3117408 3340080 3409665 3507084 3636976 3757590 3810240 3896760 4008096 4091598 4383855 4453440 4509108 4546220 4676112 5010120 5195680 5260626 5455464 5636385 5845140 6012144 6137397 6234816 6680160 6819330 7014168 7273952 7515180 7793520 7890939 8016192 8183196 8767710 9018216 9092440 9352224 10020240 10228995 10391360 10521252 10910928 11272770 11690280 12024288 12274794 13151565 13360320 13638660 14028336 14547904 15030360 15587040 15781878 16366392 17535420 18036432 18184880 18412191 18704448 20040480 20457990 21042504 21520321 21821856 22545540 23380560 24048576 24549588 26303130 27277320 28056672 30060720 30686985 31174080 31563756 32732784 35070840 36072864 36369760 36824382 39454695 40080960 40915980 42085008 43040642 43643712 45091080 46761120 49099176 52606260 54554640 55236573 56113344 60121440 61373970 63127512 64560963 65465568 70141680 72145728 72739520 73648764 78909390 81831960 84170016 86081284 90182160 92060955 93522240 98198352 105212520 107601605 109109280 110473146 120242880 122747940 126255024 129121926 130931136 140283360 147297528 150642247 157818780 163663920 168340032 172162568 180364320 184121910 193682889 196396704 210425040 215203210 218218560 220946292 245495880 252510048 258243852 276182865 280566720 294595056 301284494 315637560 322804815 327327840 344325136 360728640 368243820 387365778 392793408 420850080 430406420 441892584 451926741 490991760 505020096 516487704 552365730 581048667 589190112 602568988 631275120 645609630 654655680 688650272 736487640 753211235 774731556 841700160 860812840 883785168 903853482 968414445 981983520 1032975408 1054495729 1104731460 1162097334 1178380224 1205137976 1262550240 1291219260 1355780223 1377300544 1472975280 1506422470 1549463112 1721625680 1743146001 1767570336 1807706964 1936828890 1963967040 2065950816 2108991458 2209462920 2259633705 2324194668 2410275952 2525100480 2582438520 2711560446 2905243335 2945950560 3012844940 3098926224 3163487187 3443251360 3486292002 3535140672 3615413928 3873657780 4067340669 4131901632 4217982916 4418925840 4519267410 4648389336 4820551904 5164877040 5229438003 5272478645 5423120892 5810486670 5891901120 6025689880 6197852448 6326974374 6778901115 6886502720 6972584004 7230827856 7747315560 8134681338 8435965832 8715730005 8837851680 9038534820 9296778672 9490461561 9641103808 10329754080 10458876006 10544957290 10846241784 11620973340 12051379760 12202022007 12395704896 12653948748 13557802230 13945168008 14461655712 15494631120 15817435935 16269362676 16871931664 17431460010 17675703360 18077069640 18593557344 18980923122 20336703345 20659508160 20917752012 21089914580 21692483568 23241946680 24102759520 24404044014 25307897496 26147190015 27115604460 27890336016 28471384683 28923311424 30989262240 31634871870 32538725352 33743863328 34862920020 36154139280 36606066021 37187114688 37961846244 40673406690 41835504024 42179829160 43384967136 46483893360 47452307805 48205519040 48808088028 50615794992 52294380030 54231208920 55780672032 56942769366 61010110035 61978524480 63269743740 65077450704 67487726656 69725840040 72308278560 73212132042 75923692488 81346813380 83671008048 84359658320 85414154049 86769934272 92967786720 94904615610 97616176056 101231589984 104588760060 108462417840 111561344064 113885538732 122020220070 126539487480 130154901408 139451680080 142356923415 144616557120 146424264084 151847384976 162693626760 167342016096 168719316640 170828308098 183030330105 185935573440 189809231220 195232352112 202463179968 209177520120 216924835680 227771077464 244040440140 253078974960 256242462147 260309802816 278903360160 284713846830 292848528168 303694769952 325387253520 334684032192 337438633280 341656616196 366060660210 379618462440 390464704224 418355040240 427070770245 433849671360 455542154928 488080880280 506157949920 512484924294 557806720320 569427693660 585697056336 607389539904 650774507040 683313232392 732121320420 759236924880 780929408448 836710080480 854141540490 911084309856 976161760560 1012315899840 1024969848588 1138855387320 1171394112672 1281212310735 1301549014080 1366626464784 1464242640840 1518473849760 1673420160960 1708283080980 1822168619712 1952323521120 2049939697176 2277710774640 2342788225344 2562424621470 2733252929568 2928485281680 3036947699520 3416566161960 3904647042240 4099879394352 4555421549280 5124849242940 5466505859136 5856970563360 6833132323920 8199758788704 9110843098560 10249698485880 11713941126720 13666264647840 16399517577408 20499396971760 27332529295680 40998793943520 81997587887040
• Sum of all divisors σ(n): 340309116810936
• Sum of proper divisors (its aliquot sum) s(n): 258311528923896
• 81997587887040 is an abundant number, because the sum of its proper divisors (258311528923896) is greater than itself. Its abundance is 176313941036856

Bases of 81997587887040

• Binary: 10010101001001110001101000110010011001111000000₂
• Hexadecimal: 0x4A938D1933C0
• Base-36: T2D66PO00

Squares and roots of 81997587887040

• 81997587887040 squared (81997587887040²) is 6723604419292848931799961600
• 81997587887040 cubed (81997587887040³) is 551319344288655922852653134356497137664000
• The square root of 81997587887040 is 9055251.9505003283
• The cube root of 81997587887040 is 43444.3888624483

Scales and comparisons

• 81,997,587,887,040 seconds is equal to 2,607,269 years, 34 weeks, 2 days, 2 hours, 24 minutes.
• To count from 1 to 81,997,587,887,040 would take you about six million, five hundred eighteen thousand, one hundred seventy-four 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 81997587887040 cubic inches would be around 3620.4 feet tall.

Recreational maths with 81997587887040

• 81997587887040 backwards is 04078878579918
• 81997587887040 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81997587887040's digits is 81
• More coming soon!