81132645319821

Names of 81132645319821

• Cardinal: 81132645319821 can be written as Eighty-one trillion, one hundred thirty-two billion, six hundred forty-five million, three hundred nineteen thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 8.1132645319821 × 10¹³

Factors of 81132645319821

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 90

Divisors of 81132645319821

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 9 19 27 31 37 57 81 93 111 171 243 279 333 361 513 589 703 837 961 999 1083 1147 1369 1539 1767 2109 2511 2883 2997 3249 3441 4107 4617 5301 6327 6859 7533 8649 8991 9747 10323 11191 12321 13357 15903 18259 18981 20577 21793 25947 26011 29241 30969 33573 35557 36963 40071 42439 47709 50653 54777 56943 61731 65379 77841 78033 87723 92907 100719 106671 110889 120213 127317 143127 151959 164331 170829 185193 196137 212629 233523 234099 253783 278721 302157 320013 332667 346921 360639 381951 414067 455877 492993 494209 555579 588411 637887 675583 702297 761349 806341 906471 960039 962407 1040763 1081917 1145853 1242201 1315609 1367631 1478979 1482627 1570243 1666737 1765233 1913661 2026749 2106891 2284047 2419023 2719413 2880117 2887221 3122289 3245751 3437559 3726603 3946827 4102893 4436937 4447881 4710729 5295699 5740983 6080247 6320673 6591499 6852141 7257069 7867273 8640351 8661663 9366867 9389971 10312677 11179809 11840481 12308679 12836077 13343643 14132187 15320479 17222949 18240741 18285733 19774497 20556423 21771207 23601819 24996571 25984989 28100601 28169913 29834617 33539427 35521443 38508231 40030929 42396561 45961437 48677533 51668847 54722223 54857199 59323491 61669269 65313621 70805457 74989713 77954967 84301803 84509739 89503851 100618281 106564329 115524693 120092787 127189683 137884311 146032599 164166669 164571597 177970473 195940863 212416371 224969139 233864901 243885463 253529217 268511553 291089101 319692987 346574079 347428927 381569049 413652933 438097797 474934849 493714791 533911419 566857723 637249113 674907417 731656389 760587651 805534659 873267303 924873127 1039722237 1042286781 1240958799 1314293391 1424804547 1481144373 1601734257 1700573169 1911747339 2024722251 2194969167 2281762953 2416603977 2619801909 2774619381 3119166711 3126860343 3722876397 3942880173 4274413641 4443433119 5101719507 6074166753 6584907501 7249811931 7859405727 8323858143 9023762131 9380581029 10770296737 11828640519 12823240923 15305158521 17572589413 19754722503 23578217181 24971574429 27071286393 28141743087 32310890211 38469722769 45915475563 52717768239 59264167509 70734651543 74914723287 81213859179 84425229261 96932670633 115409168307 137746426689 158153304717 224744169861 243641577537 290798011899 333879198847 474459914151 730924732611 872394035697 1001637596541 1423379742453 2192774197833 2617182107091 3004912789623 4270139227359 9014738368869 27044215106607 81132645319821
• Sum of all divisors σ(n): 136236463708800
• Sum of proper divisors (its aliquot sum) s(n): 55103818388979
• 81132645319821 is a deficient number, because the sum of its proper divisors (55103818388979) is less than itself. Its deficiency is 26028826930842

Bases of 81132645319821

• Binary: 10010011100101000101010100000010000010010001101₂
• Hexadecimal: 0x49CA2A81048D
• Base-36: SRBTM8NT9

Squares and roots of 81132645319821

• 81132645319821 squared (81132645319821²) is 6582506136591872415375472041
• 81132645319821 cubed (81132645319821³) is 534056135695653589672899942567677288624661
• The square root of 81132645319821 is 9007366.1699645031
• The cube root of 81132645319821 is 43291.0924576379

Scales and comparisons

• 81,132,645,319,821 seconds is equal to 2,579,767 years, 8 weeks, 2 days, 18 hours, 10 minutes, 21 seconds.
• To count from 1 to 81,132,645,319,821 would take you about six million, four hundred forty-nine thousand, four hundred seventeen 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 81132645319821 cubic inches would be around 3607.6 feet tall.

Recreational maths with 81132645319821

• 81132645319821 backwards is 12891354623118
• The number of decimal digits it has is: 14
• The sum of 81132645319821's digits is 54
• More coming soon!