81455076720

Names of 81455076720

• Cardinal: 81455076720 can be written as Eighty-one billion, four hundred fifty-five million, seventy-six thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.145507672 × 10¹⁰

Factors of 81455076720

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1992

Divisors of 81455076720

• Number of divisors d(n): 480
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 31 36 37 40 45 48 53 60 62 72 74 80 90 93 106 111 120 124 144 148 155 159 180 185 186 212 222 240 248 265 279 296 310 318 333 360 370 372 424 444 465 477 496 530 555 558 592 620 636 666 720 740 744 795 848 888 930 954 1060 1110 1116 1147 1240 1272 1332 1395 1480 1488 1590 1643 1665 1776 1860 1861 1908 1961 2120 2220 2232 2294 2385 2480 2544 2664 2790 2960 3180 3286 3330 3441 3720 3722 3816 3922 4240 4440 4464 4588 4770 4929 5328 5580 5583 5735 5883 6360 6572 6660 6882 7440 7444 7632 7844 8215 8880 9176 9305 9540 9805 9858 10323 11160 11166 11470 11766 12720 13144 13320 13764 14787 14888 15688 16430 16749 17205 17649 18352 18610 19080 19610 19716 20646 22320 22332 22940 23532 24645 26288 26640 27528 27915 29415 29574 29776 31376 32860 33498 34410 35298 37220 38160 39220 39432 41292 44664 45880 47064 49290 51615 55056 55830 57691 58830 59148 60791 65720 66996 68820 68857 70596 73935 74440 78440 78864 82584 83745 88245 89328 91760 94128 98580 98633 103230 111660 115382 117660 118296 121582 131440 133992 137640 137714 141192 147870 148880 156880 165168 167490 173073 176490 182373 197160 197266 206460 206571 223320 230764 235320 236592 243164 267984 275280 275428 282384 288455 295740 295899 303955 334980 344285 346146 352980 364746 394320 394532 412920 413142 446640 461528 470640 486328 493165 519219 547119 550856 576910 591480 591798 607910 619713 669960 688570 692292 705960 729492 789064 825840 826284 865365 887697 911865 923056 972656 986330 1032855 1038438 1094238 1101712 1153820 1182960 1183596 1215820 1239426 1339920 1377140 1384584 1411920 1458984 1479495 1578128 1652568 1730730 1775394 1823730 1972660 2065710 2076876 2134567 2188476 2307640 2367192 2431640 2478852 2596095 2735595 2754280 2769168 2917968 2958990 3057623 3098565 3305136 3461460 3550788 3647460 3649421 3945320 4131420 4153752 4269134 4376952 4438485 4615280 4734384 4863280 4957704 5192190 5471190 5508560 5917980 6115246 6197130 6403701 6922920 7101576 7294920 7298842 7890640 8262840 8307504 8538268 8753904 8876970 9172869 9915408 10384380 10672835 10942380 10948263 11835960 12230492 12394260 12807402 13845840 14203152 14589840 14597684 15288115 16525680 17076536 17753940 18247105 18345738 19211103 20768760 21345670 21884760 21896526 23671920 24460984 24788520 25614804 27518607 29195368 30576230 32018505 32844789 34153072 35507880 36494210 36691476 38422206 41537520 42691340 43769520 43793052 45864345 48921968 49577040 51229608 54741315 55037214 58390736 61152460 64037010 65689578 71015760 72988420 73382952 76844412 85382680 87586104 91728690 96055515 102459216 109482630 110074428 113132051 122304920 128074020 131379156 137593035 145976840 146765904 153688824 164223945 170765360 175172208 183457380 192111030 218965260 220148856 226264102 244609840 256148040 262758312 275186070 291953680 307377648 328447890 339396153 366914760 384222060 437930520 440297712 452528204 512296080 525516624 550372140 565660255 656895780 678792306 733829520 768444120 875861040 905056408 1018188459 1100744280 1131320510 1313791560 1357584612 1536888240 1696980765 1810112816 2036376918 2201488560 2262641020 2627583120 2715169224 3393961530 4072753836 4525282040 5090942295 5430338448 6787923060 8145507672 9050564080 10181884590 13575846120 16291015344 20363769180 27151692240 40727538360 81455076720
• Sum of all divisors σ(n): 295640077824
• Sum of proper divisors (its aliquot sum) s(n): 214185001104
• 81455076720 is an abundant number, because the sum of its proper divisors (214185001104) is greater than itself. Its abundance is 132729924384

Bases of 81455076720

• Binary: 1001011110111000110011101010101110000₂
• Hexadecimal: 0x12F719D570
• Base-36: 11F48ZG0

Squares and roots of 81455076720

• 81455076720 squared (81455076720²) is 6634929523461085958400
• 81455076720 cubed (81455076720³) is 540448693365315796675986728448000
• The square root of 81455076720 is 285403.3579339949
• The cube root of 81455076720 is 4334.8364748763

Scales and comparisons

• 81,455,076,720 seconds is equal to 2,590 years, 1 week, 2 hours, 12 minutes.
• To count from 1 to 81,455,076,720 would take you about five thousand, one hundred eighty 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 81455076720 cubic inches would be around 361.2 feet tall.

Recreational maths with 81455076720

• 81455076720 backwards is 02767055418
• 81455076720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81455076720's digits is 45
• More coming soon!