81315442172448

Names of 81315442172448

• Cardinal: 81315442172448 can be written as Eighty-one trillion, three hundred fifteen billion, four hundred forty-two million, one hundred seventy-two thousand, four hundred forty-eight.

Scientific notation

• Scientific notation: 8.1315442172448 × 10¹³

Factors of 81315442172448

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 11341

Divisors of 81315442172448

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 27 32 33 36 44 48 54 66 72 81 88 96 99 108 127 132 144 162 176 198 216 254 264 288 297 324 352 381 396 432 508 528 594 648 762 792 864 891 1016 1056 1143 1188 1296 1397 1524 1584 1782 2032 2286 2376 2592 2617 2794 3048 3168 3429 3564 4064 4191 4572 4752 5234 5588 6096 6858 7128 7851 8382 8581 9144 9504 10287 10468 11176 12192 12573 13716 14256 15702 16764 17162 18288 20574 20936 22352 23553 25146 25743 27432 28512 28787 31404 33528 34324 36576 37719 41148 41872 44704 47106 50292 51486 54864 57574 62808 67056 68648 70659 75438 77229 82296 83744 86361 94212 94391 100584 102972 109728 113157 115148 125616 134112 137296 141318 150876 154458 164592 172722 188424 188782 201168 205944 211977 226314 230296 231687 251232 259083 274592 282636 283173 301752 308916 329184 332359 345444 376848 377564 402336 411888 423954 452628 460592 463374 518166 565272 566346 603504 617832 664718 690888 695061 753696 755128 777249 823776 847908 849519 905256 921184 926748 997077 1036332 1089787 1130544 1132692 1207008 1235664 1329436 1381776 1390122 1510256 1554498 1695816 1699038 1810512 1853496 1994154 2072664 2179574 2261088 2265384 2331747 2471328 2548557 2658872 2763552 2780244 2991231 3020512 3108996 3269361 3391632 3398076 3621024 3655949 3706992 3988308 4145328 4359148 4530768 4663494 5097114 5317744 5560488 5982462 6217992 6538722 6783264 6796152 7311898 7413984 7645671 7976616 8290656 8718296 8973693 9061536 9326988 9808083 10194228 10635488 10967847 11120976 11964924 11987657 12435984 13077444 13592304 14623796 15291342 15953232 17436592 17947386 18653976 19616166 20388456 21935694 22241952 22456477 23929848 23975314 24871968 26154888 26921079 27184608 29247592 29424249 30582684 31906464 32903541 34873184 35894772 35962971 37307952 39232332 40776912 43871388 44912954 47859696 47950628 52309776 53842158 58495184 58848498 61165368 65807082 67369431 71789544 71925942 74615904 78464664 81553824 87742776 88272747 89825908 95719392 95901256 98710623 104619552 107684316 107888913 116990368 117696996 122330736 131614164 134738862 143579088 143851884 156929328 175485552 176545494 179651816 191802512 197421246 202108293 215368632 215777826 235393992 244661472 247021247 263228328 269477724 287158176 287703768 296131869 313858656 323666739 350971104 353090988 359303632 383605024 394842492 404216586 430737264 431555652 470787984 494042494 526456656 538955448 575407536 592263738 606324879 647333478 706181976 718607264 741063741 789684984 808433172 861474528 863111304 941575968 971000217 988084988 1052913312 1077910896 1150815072 1184527476 1212649758 1294666956 1412363952 1482127482 1579369968 1616866344 1726222608 1818974637 1942000434 1976169976 2155821792 2223191223 2369054952 2425299516 2589333912 2824727904 2851972579 2964254964 3158739936 3233732688 3452445216 3637949274 3884000868 3952339952 4446382446 4738109904 4850599032 5178667824 5703945158 5928509928 6467465376 6669573669 7275898548 7768001736 7904679904 8555917737 8892764892 9476219808 9701198064 10357335648 11407890316 11857019856 13339147338 14551797096 15536003472 17111835474 17785529784 19402396128 20008721007 22815780632 23714039712 25667753211 26678294676 29103594192 31072006944 31371698369 34223670948 35571059568 40017442014 45631561264 51335506422 53356589352 58207188384 62743396738 68447341896 71142119136 77003259633 80034884028 91263122528 94115095107 102671012844 106713178704 125486793476 136894683792 154006519266 160069768056 188230190214 205342025688 213426357408 231009778899 250973586952 273789367584 282345285321 308013038532 320139536112 376460380428 410684051376 462019557798 501947173904 564690570642 616026077064 640279072224 752920760856 821368102752 847035855963 924039115596 1003894347808 1129381141284 1232052154128 1505841521712 1694071711926 1848078231192 2258762282568 2464104308256 2541107567889 3011683043424 3388143423852 3696156462384 4517524565136 5082215135778 6776286847704 7392312924768 9035049130272 10164430271556 13552573695408 20328860543112 27105147390816 40657721086224 81315442172448
• Sum of all divisors σ(n): 263072400611328
• Sum of proper divisors (its aliquot sum) s(n): 181756958438880
• 81315442172448 is an abundant number, because the sum of its proper divisors (181756958438880) is greater than itself. Its abundance is 100441516266432

Bases of 81315442172448

• Binary: 10010011111010010111010000010111010001000100000₂
• Hexadecimal: 0x49F4BA0BA220
• Base-36: STNSQRM00

Squares and roots of 81315442172448

• 81315442172448 squared (81315442172448²) is 6612201135700734713770312704
• 81315442172448 cubed (81315442172448³) is 537674059082668084424296763924238053179392
• The square root of 81315442172448 is 9017507.5365894761
• The cube root of 81315442172448 is 43323.5805708261

Scales and comparisons

• 81,315,442,172,448 seconds is equal to 2,585,579 years, 27 weeks, 6 days, 1 hour, 40 minutes, 48 seconds.
• To count from 1 to 81,315,442,172,448 would take you about six million, four hundred sixty-three thousand, nine hundred forty-eight 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 81315442172448 cubic inches would be around 3610.3 feet tall.

Recreational maths with 81315442172448

• 81315442172448 backwards is 84427124451318
• 81315442172448 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81315442172448's digits is 54
• More coming soon!