81738576864

Names of 81738576864

• Cardinal: 81738576864 can be written as Eighty-one billion, seven hundred thirty-eight million, five hundred seventy-six thousand, eight hundred sixty-four.

Scientific notation

• Scientific notation: 8.1738576864 × 10¹⁰

Factors of 81738576864

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 836

Divisors of 81738576864

• Number of divisors d(n): 576
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 16 18 21 23 24 28 29 32 36 42 46 48 56 58 63 69 72 84 87 89 92 96 112 116 126 138 144 161 168 174 178 184 203 207 224 232 252 261 267 276 288 322 336 348 356 368 406 414 464 483 504 522 534 552 609 623 644 667 672 683 696 712 736 801 812 828 928 966 1008 1044 1068 1104 1218 1246 1288 1334 1366 1392 1424 1449 1602 1624 1656 1827 1869 1932 2001 2016 2047 2049 2088 2136 2208 2436 2492 2576 2581 2668 2732 2784 2848 2898 3204 3248 3312 3654 3738 3864 4002 4094 4098 4176 4272 4669 4781 4872 4984 5152 5162 5336 5464 5607 5796 6003 6141 6147 6408 6496 6624 7308 7476 7728 7743 8004 8188 8196 8352 8544 9338 9562 9744 9968 10324 10672 10928 11214 11592 12006 12282 12294 12816 14007 14329 14343 14616 14952 15456 15486 15709 16008 16376 16392 18067 18423 18676 19124 19488 19807 19936 20648 21344 21856 22428 23184 23229 24012 24564 24588 25632 28014 28658 28686 29232 29904 30972 31418 32016 32752 32784 36134 36846 37352 38248 39614 41296 42021 42987 43029 44856 46368 46458 47127 48024 49128 49176 54201 56028 57316 57372 58464 59363 59421 59808 60787 61944 62836 64032 65504 65568 72268 73692 74704 76496 79228 82592 84042 85974 86058 89712 92916 94254 96048 98256 98352 108402 109963 112056 114632 114744 118726 118842 121574 123888 125672 128961 138649 141381 144536 147384 149408 152992 158456 162603 168084 171948 172116 178089 178263 179424 182361 185832 188508 192096 196512 196704 216804 219926 224112 229264 229488 237452 237684 243148 247776 251344 257922 277298 282762 289072 294768 316912 325206 329889 336168 343896 344232 356178 356526 364722 371664 377016 415541 415947 425509 433608 439852 448224 455561 458528 458976 474904 475368 486296 502688 515844 534267 547083 554596 565524 578144 589536 633824 650412 659778 672336 687792 688464 712356 713052 729444 743328 754032 831082 831894 851018 867216 879704 911122 949808 950736 972592 989667 1031688 1068534 1094166 1109192 1131048 1246623 1247841 1276527 1300824 1319556 1344672 1366683 1375584 1376928 1398101 1424712 1426104 1458888 1508064 1662164 1663788 1702036 1734432 1759408 1762823 1822244 1899616 1901472 1945184 1979334 2063376 2137068 2188332 2218384 2262096 2493246 2495682 2553054 2601648 2639112 2733366 2796202 2849424 2852208 2917776 3188927 3324328 3327576 3404072 3518816 3525646 3644488 3739869 3829581 3958668 4100049 4126752 4194303 4274136 4376664 4436768 4524192 4986492 4991364 5106108 5203296 5278224 5288469 5466732 5592404 5698848 5704416 5835552 6377854 6648656 6655152 6808144 7051292 7288976 7479738 7659162 7917336 8200098 8388606 8548272 8753328 9566781 9786707 9972984 9982728 10212216 10556448 10576938 10933464 11184808 12339761 12582909 12755708 13297312 13310304 13616288 14102584 14577952 14959476 15318324 15834672 15865407 16400196 16777212 17096544 17506656 19133562 19573414 19945968 19965456 20424432 21153876 21866928 22369616 24679522 25165818 25511416 28205168 28700343 29360121 29918952 30636648 31669344 31730814 32800392 33554424 37019283 38267124 39146828 39891936 39930912 40544929 40848864 42307752 43733856 44739232 49359044 50331636 51022832 56410336 57400686 58720242 59837904 61273296 63461628 65600784 67108848 74038566 76534248 78293656 81089858 84615504 88080363 98718088 100663272 102045664 111057849 114801372 117440484 119675808 121634787 122546592 126923256 131201568 134217696 148077132 153068496 156587312 162179716 169231008 176160726 197436176 201326544 222115698 229602744 234880968 243269574 253846512 283814503 296154264 306136992 313174624 324359432 352321452 364904361 394872352 402653088 444231396 459205488 469761936 486539148 507693024 567629006 592308528 648718864 704642904 729808722 851443509 888462792 918410976 939523872 973078296 1135258012 1184617056 1297437728 1409285808 1459617444 1702887018 1776925584 1946156592 2270516024 2554330527 2818571616 2919234888 3405774036 3553851168 3892313184 4541032048 5108661054 5838469776 6811548072 9082064096 10217322108 11676939552 13623096144 20434644216 27246192288 40869288432 81738576864
• Sum of all divisors σ(n): 290405606400
• Sum of proper divisors (its aliquot sum) s(n): 208667029536
• 81738576864 is an abundant number, because the sum of its proper divisors (208667029536) is greater than itself. Its abundance is 126928452672

Bases of 81738576864

• Binary: 1001100000111111111111011001111100000₂
• Hexadecimal: 0x1307FFB3E0
• Base-36: 11JT1DK0

Squares and roots of 81738576864

• 81738576864 squared (81738576864²) is 6681194947752036074496
• 81738576864 cubed (81738576864³) is 546111366780198264687692126060544
• The square root of 81738576864 is 285899.5922767291
• The cube root of 81738576864 is 4339.8597090571

Scales and comparisons

• 81,738,576,864 seconds is equal to 2,599 years, 1 week, 5 days, 8 hours, 14 minutes, 24 seconds.
• To count from 1 to 81,738,576,864 would take you about five thousand, one hundred ninety-eight 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 81738576864 cubic inches would be around 361.7 feet tall.

Recreational maths with 81738576864

• 81738576864 backwards is 46867583718
• 81738576864 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81738576864's digits is 63
• More coming soon!