81721643679468

Names of 81721643679468

• Cardinal: 81721643679468 can be written as Eighty-one trillion, seven hundred twenty-one billion, six hundred forty-three million, six hundred seventy-nine thousand, four hundred sixty-eight.

Scientific notation

• Scientific notation: 8.1721643679468 × 10¹³

Factors of 81721643679468

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 10415

Divisors of 81721643679468

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 3 4 6 9 12 13 18 26 27 36 39 52 54 71 78 81 108 117 142 156 162 169 213 234 284 324 338 351 426 468 507 639 676 702 852 923 1014 1053 1278 1404 1521 1846 1917 2028 2106 2556 2769 2789 3042 3692 3834 4212 4563 5538 5578 5751 6084 7537 7668 8307 8367 9126 11076 11156 11502 11999 13689 15074 16614 16734 18252 22611 23004 23998 24921 25101 27378 30148 33228 33468 35997 36257 45222 47996 49842 50202 54756 67833 71994 72514 74763 75303 90444 97981 99684 100404 107991 108771 135666 143988 145028 149526 150606 195962 198019 203499 215982 217542 225909 271332 293943 299052 301212 323973 326313 391924 396038 406998 431964 435084 451818 471341 535127 587886 594057 610497 647946 652626 792076 813996 881829 903636 942682 971919 978939 1070254 1175772 1188114 1220994 1273753 1295892 1305252 1414023 1605381 1763658 1782171 1885364 1943838 1957878 2140508 2376228 2441988 2547506 2574247 2645487 2828046 2936817 3210762 3527316 3564342 3821259 3887676 3915756 4242069 4816143 5095012 5148494 5290974 5346513 5656092 5873634 6421524 6956651 7128684 7642518 7722741 7936461 8484138 9632286 10296988 10581948 10693026 11463777 11747268 12726207 13913302 14448429 15285036 15445482 15872922 16039539 16968276 19264572 20869953 21020693 21386052 22927554 23168223 25452414 27826604 28896858 30890964 31745844 32079078 33465211 34391331 38178621 41739906 42041386 43345287 45855108 46336446 50904828 57793716 62609859 63062079 64158156 66930422 68782662 69504669 76357242 83479812 84082772 86690574 90436463 92672892 100395633 103173993 125219718 126124158 133860844 137565324 139009338 152714484 173381148 180872926 187829577 189186237 200791266 206347986 208514007 250439436 252248316 271309389 273269009 278018676 301186899 361745852 375659154 378372474 401582532 412695972 417028014 542618778 546538018 563488731 567558711 602373798 751318308 756744948 813928167 819807027 834056028 903560697 1085237556 1093076036 1126977462 1135117422 1204747596 1492469203 1627856334 1639614054 1702676133 1807121394 2253954924 2270234844 2441784501 2459421081 2710682091 2984938406 3255712668 3279228108 3405352266 3552497117 3614242788 4477407609 4883569002 4918842162 5421364182 5969876812 6810704532 7104994234 7325353503 7378263243 8954815218 9767138004 9837684324 10657491351 10842728364 13432222827 14209988468 14650707006 14756526486 17909630436 19402099639 21314982702 22134789729 26864445654 29301414012 29513052972 31972474053 38804199278 40296668481 42629965404 44269579458 53728891308 58206298917 63944948106 77608398556 80593336962 88539158916 95917422159 116412597834 120890005443 127889896212 161186673924 174618896751 191834844318 232825195668 241780010886 252227295307 287752266477 349237793502 383669688636 483560021772 504454590614 523856690253 575504532954 698475587004 756681885921 1008909181228 1047713380506 1151009065908 1513363771842 1571570070759 2095426761012 2270045657763 3026727543684 3143140141518 4540091315526 6286280283036 6810136973289 9080182631052 13620273946578 20430410919867 27240547893156 40860821839734 81721643679468
• Sum of all divisors σ(n): 234707697433440
• Sum of proper divisors (its aliquot sum) s(n): 152986053753972
• 81721643679468 is an abundant number, because the sum of its proper divisors (152986053753972) is greater than itself. Its abundance is 71264410074504

Bases of 81721643679468

• Binary: 10010100101001101001101100010101011111011101100₂
• Hexadecimal: 0x4A534D8ABEEC
• Base-36: SYUEKNMR0

Squares and roots of 81721643679468

• 81721643679468 squared (81721643679468²) is 6678427045673932113524763024
• 81721643679468 cubed (81721643679468³) is 545772035365887242457681460819372114391232
• The square root of 81721643679468 is 9040002.4158994561
• The cube root of 81721643679468 is 43395.6000267069

Scales and comparisons

• 81,721,643,679,468 seconds is equal to 2,598,495 years, 25 weeks, 2 days, 9 hours, 37 minutes, 48 seconds.
• To count from 1 to 81,721,643,679,468 would take you about six million, four hundred ninety-six thousand, two hundred thirty-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 81721643679468 cubic inches would be around 3616.3 feet tall.

Recreational maths with 81721643679468

• 81721643679468 backwards is 86497634612718
• The number of decimal digits it has is: 14
• The sum of 81721643679468's digits is 72
• More coming soon!