81409784976

Names of 81409784976

• Cardinal: 81409784976 can be written as Eighty-one billion, four hundred nine million, seven hundred eighty-four thousand, nine hundred seventy-six.

Scientific notation

• Scientific notation: 8.1409784976 × 10¹⁰

Factors of 81409784976

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 108

Divisors of 81409784976

• Number of divisors d(n): 405
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 16 18 24 26 31 36 39 48 52 59 62 72 78 93 104 117 118 124 144 156 169 177 186 208 234 236 248 279 312 338 354 372 403 468 472 496 507 531 558 624 676 708 744 767 806 936 944 961 1014 1062 1116 1209 1352 1416 1488 1521 1534 1612 1829 1872 1922 2028 2124 2232 2301 2418 2704 2832 2883 3042 3068 3224 3481 3627 3658 3844 4056 4248 4464 4602 4836 5239 5487 5766 6084 6136 6448 6903 6962 7254 7316 7688 8112 8496 8649 9204 9672 9971 10443 10478 10974 11532 12168 12272 12493 13806 13924 14508 14632 15376 15717 16461 17298 18408 19344 19942 20886 20956 21948 23064 23777 24336 24986 27612 27848 29016 29264 29913 31329 31434 32922 34596 36816 37479 39884 41772 41912 43896 45253 46128 47151 47554 49972 55224 55696 56699 58032 59826 62658 62868 65844 69192 71331 74958 79768 83544 83824 87792 89739 90506 94302 95108 99944 107911 110448 112437 113398 119652 125316 125736 131688 135759 138384 142662 149916 159536 162409 167088 170097 179478 181012 188604 190216 199888 213993 215822 224874 226796 239304 250632 251472 263376 271518 285324 299832 309101 323733 324818 340194 358956 362024 377208 380432 407277 427986 431644 449748 453592 478608 487227 501264 510291 543036 570648 588289 599664 618202 647466 649636 680388 717912 724048 737087 754416 814554 855972 863288 899496 907184 927303 971199 974454 1020582 1086072 1141296 1176578 1236404 1294932 1299272 1360776 1402843 1435824 1461681 1474174 1629108 1711944 1726576 1764867 1798992 1854606 1942398 1948908 2041164 2172144 2211261 2353156 2472808 2589864 2598544 2721552 2781909 2805686 2923362 2948348 3258216 3345241 3423888 3529734 3709212 3884796 3897816 4082328 4208529 4422522 4706312 4945616 5179728 5294601 5563818 5611372 5846724 5896696 6516432 6633783 6690482 7059468 7418424 7769592 7795632 8164656 8417058 8845044 9412624 9582131 10035723 10589202 11127636 11222744 11693448 11793392 12625587 13267566 13380964 14118936 14836848 15539184 16834116 17690088 18236959 19164262 20071446 21178404 22255272 22445488 23386896 25251174 26535132 26761928 28237872 28746393 30107169 33668232 35380176 36473918 38328524 40142892 42356808 43488133 44510544 50502348 53070264 53523856 54710877 57492786 60214338 67336464 72947836 76657048 80285784 84713616 86239179 86976266 101004696 106140528 109421754 114985572 120428676 130464399 145895672 153314096 160571568 164132631 172478358 173952532 202009392 218843508 229971144 240857352 260928798 291791344 328265262 344956716 347905064 391393197 437687016 459942288 481714704 521857596 565345729 656530524 689913432 695810128 782786394 875374032 1043715192 1130691458 1313061048 1379826864 1565572788 1696037187 2087430384 2261382916 2626122096 3131145576 3392074374 4522765832 5088111561 6262291152 6784148748 9045531664 10176223122 13568297496 20352446244 27136594992 40704892488 81409784976
• Sum of all divisors σ(n): 259317192537
• Sum of proper divisors (its aliquot sum) s(n): 177907407561
• 81409784976 is an abundant number, because the sum of its proper divisors (177907407561) is greater than itself. Its abundance is 96497622585

Bases of 81409784976

• Binary: 1001011110100011001101011110010010000₂
• Hexadecimal: 0x12F466BC90
• Base-36: 11EDA840

Squares and roots of 81409784976

• 81409784976 squared (81409784976²) is 6627553089838555320576
• 81409784976 cubed (81409784976³) is 539547671960781199202572908466176
• 81409784976 is a perfect square number. Its square root is 285324
• The cube root of 81409784976 is 4334.0328879497

Scales and comparisons

• 81,409,784,976 seconds is equal to 2,588 years, 30 weeks, 21 hours, 9 minutes, 36 seconds.
• To count from 1 to 81,409,784,976 would take you about five thousand, one hundred seventy-seven 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 81409784976 cubic inches would be around 361.2 feet tall.

Recreational maths with 81409784976

• 81409784976 backwards is 67948790418
• The number of decimal digits it has is: 11
• The sum of 81409784976's digits is 63
• More coming soon!