81681075080390400

Names of 81681075080390400

• Cardinal: 81681075080390400 can be written as Eighty-one quadrillion, six hundred eighty-one trillion, seventy-five billion, eighty million, three hundred ninety thousand, four hundred.

Scientific notation

• Scientific notation: 8.16810750803904 × 10¹⁶

Factors of 81681075080390400

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 6133888

Divisors of 81681075080390400

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 32 40 48 50 60 64 75 80 96 100 120 128 150 160 192 200 240 256 300 320 384 400 480 600 640 768 800 960 1200 1280 1600 1920 2400 3200 3840 4800 6400 9600 19200 797161 1594322 2391483 3188644 3985805 4782966 5336717 6377288 7971610 9565932 10673434 11957415 12754576 15943220 16010151 19131864 19929025 21346868 23914830 25509152 26683585 31886440 32020302 38263728 39858050 42693736 47829660 51018304 53367170 59787075 63772880 64040604 76527456 79716100 80050755 85387472 95659320 102036608 106734340 119574150 127545760 128081208 133417925 153054912 159432200 160101510 170774944 191318640 204073216 213468680 239148300 255091520 256162416 266835850 306109824 318864400 320203020 341549888 382637280 400253775 426937360 478296600 510183040 512324832 533671700 612219648 637728800 640406040 683099776 765274560 800507550 853874720 956593200 1020366080 1024649664 1067343400 1275457600 1280812080 1366199552 1530549120 1601015100 1707749440 1913186400 2049299328 2134686800 2550915200 2561624160 3061098240 3202030200 3415498880 3826372800 4098598656 4269373600 5101830400 5123248320 6404060400 6830997760 7652745600 8538747200 10246496640 12808120800 15305491200 17077494400 20492993280 25616241600 34154988800 51232483200 102464966400 4254222660437 8508445320874 12762667981311 17016890641748 21271113302185 25525335962622 34033781283496 42542226604370 51050671925244 63813339906555 68067562566992 85084453208740 102101343850488 106355566510925 127626679813110 136135125133984 170168906417480 204202687700976 212711133021850 255253359626220 272270250267968 319066699532775 340337812834960 408405375401952 425422266043700 510506719252440 544540500535936 638133399065550 680675625669920 816810750803904 850844532087400 1021013438504880 1089081001071872 1276266798131100 1361351251339840 1633621501607808 1701689064174800 2042026877009760 2552533596262200 2722702502679680 3267243003215616 3403378128349600 4084053754019520 5105067192524400 5445405005359360 6806756256699200 8168107508039040 10210134385048800 13613512513398400 16336215016078080 20420268770097600 27227025026796800 40840537540195200 81681075080390400
• Sum of all divisors σ(n): 269564953323039024
• Sum of proper divisors (its aliquot sum) s(n): 187883878242648624
• 81681075080390400 is an abundant number, because the sum of its proper divisors (187883878242648624) is greater than itself. Its abundance is 106202803162258224

Bases of 81681075080390400

• Binary: 100100010001100001000000101001001000010011110011100000000₂
• Hexadecimal: 0x12230814909E700
• Base-36: MC9IVVC02YO

Squares and roots of 81681075080390400

• 81681075080390400 squared (81681075080390400²) is 6671798026288373589822616412160000
• 81681075080390400 cubed (81681075080390400³) is 544959635506461126870853236093147934420107264000000
• The square root of 81681075080390400 is 285799011.6854682197
• The cube root of 81681075080390400 is 433884.1796322753

Scales and comparisons

• 81,681,075,080,390,400 seconds is equal to 2,597,205,531 years, 20 weeks, 6 days, 10 hours, 40 minutes.
• To count from 1 to 81,681,075,080,390,400 would take you about seven billion, seven hundred ninety-one million, six hundred sixteen thousand, five hundred ninety-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 81681075080390400 cubic inches would be around 36157 feet tall.

Recreational maths with 81681075080390400

• 81681075080390400 backwards is 00409308057018618
• 81681075080390400 is a Harshad number.
• The number of decimal digits it has is: 17
• The sum of 81681075080390400's digits is 60
• More coming soon!