81379949945490

Names of 81379949945490

• Cardinal: 81379949945490 can be written as Eighty-one trillion, three hundred seventy-nine billion, nine hundred forty-nine million, nine hundred forty-five thousand, four hundred ninety.

Scientific notation

• Scientific notation: 8.137994994549 × 10¹³

Factors of 81379949945490

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 17471

Divisors of 81379949945490

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 30 35 42 45 49 61 63 70 90 98 105 122 126 147 183 210 245 294 305 315 366 427 441 490 549 610 630 735 854 882 915 1098 1281 1470 1830 2135 2205 2562 2745 2989 3843 4270 4410 5490 5978 6405 7686 8967 12810 14945 17393 17934 19215 26901 29890 34786 38430 44835 52179 53802 86965 89670 104358 121751 134505 156537 173930 243502 260895 269010 313074 365253 521790 608755 730506 782685 852257 1060973 1095759 1217510 1565370 1704514 1826265 2121946 2191518 2556771 3182919 3652530 4261285 5113542 5304865 5478795 6365838 7426811 7670313 8522570 9548757 10609730 10957590 12783855 14853622 15340626 15914595 19097514 22280433 25567710 31829190 37134055 38351565 44560866 47743785 51987677 66841299 74268110 76703130 95487570 103975354 111402165 133682598 155963031 222804330 259938385 302516449 311926062 334206495 467889093 519876770 605032898 668412990 779815155 907549347 935778186 1512582245 1559630310 1815098694 2117615143 2339445465 2722648041 3025164490 4235230286 4537746735 4678890930 5445296082 6352845429 9075493470 10588075715 12705690858 13613240205 14823306001 18453503389 19058536287 21176151430 27226480410 29646612002 31764227145 36907006778 38117072574 44469918003 55360510167 63528454290 74116530005 88939836006 92267516945 95292681435 110721020334 129174523723 133409754009 148233060010 166081530501 184535033890 190585362870 222349590015 258349047446 266819508018 276802550835 332163061002 387523571169 444699180030 553605101670 645872618615 667048770045 775047142338 830407652505 904221666061 1162570713507 1291745237230 1334097540090 1660815305010 1808443332122 1937617855845 2325141427014 2712664998183 3875235711690 4521108330305 5425329996366 5812853567535 8137994994549 9042216660610 11625707135070 13563324990915 16275989989098 27126649981830 40689974972745 81379949945490
• Sum of all divisors σ(n): 250182176671908
• Sum of proper divisors (its aliquot sum) s(n): 168802226726418
• 81379949945490 is an abundant number, because the sum of its proper divisors (168802226726418) is greater than itself. Its abundance is 87422276780928

Bases of 81379949945490

• Binary: 10010100000001110111111000000100010001010010010₂
• Hexadecimal: 0x4A03BF022292
• Base-36: SUHFL128I

Squares and roots of 81379949945490

• 81379949945490 squared (81379949945490²) is 6622696253130457853971340100
• 81379949945490 cubed (81379949945490³) is 538954689583940830875153701151017251149000
• The square root of 81379949945490 is 9021083.6347686079
• The cube root of 81379949945490 is 43335.0337828983

Scales and comparisons

• 81,379,949,945,490 seconds is equal to 2,587,630 years, 35 weeks, 3 days, 19 hours, 31 minutes, 30 seconds.
• To count from 1 to 81,379,949,945,490 would take you about six million, four hundred sixty-nine thousand and seventy-six 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 81379949945490 cubic inches would be around 3611.3 feet tall.

Recreational maths with 81379949945490

• 81379949945490 backwards is 09454994997318
• The number of decimal digits it has is: 14
• The sum of 81379949945490's digits is 81
• More coming soon!