81655500160

Names of 81655500160

• Cardinal: 81655500160 can be written as Eighty-one billion, six hundred fifty-five million, five hundred thousand, one hundred sixty.

Scientific notation

• Scientific notation: 8.165550016 × 10¹⁰

Factors of 81655500160

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 341

Divisors of 81655500160

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 32 40 43 52 64 65 80 86 97 104 128 130 160 169 172 181 194 208 215 260 320 338 344 362 388 416 430 485 520 559 640 676 688 724 776 832 845 860 905 970 1040 1118 1261 1352 1376 1448 1552 1664 1690 1720 1810 1940 2080 2236 2353 2522 2704 2752 2795 2896 3104 3380 3440 3620 3880 4160 4171 4472 4706 5044 5408 5504 5590 5792 6208 6305 6760 6880 7240 7267 7760 7783 8320 8342 8944 9412 10088 10816 11180 11584 11765 12416 12610 13520 13760 14480 14534 15520 15566 16393 16684 17557 17888 18824 20176 20855 21632 22360 23168 23530 25220 27040 27520 28960 29068 30589 31040 31132 32786 33368 35114 35776 36335 37648 38915 40352 41710 44720 47060 50440 54080 54223 57920 58136 61178 62080 62264 65572 66736 70228 71552 72670 75296 77830 80704 81965 83420 87785 89440 94120 100880 101179 108160 108446 115840 116272 122356 124528 131144 133472 140456 145340 150592 152945 155660 161408 163930 166840 175570 178880 188240 201760 202358 216892 228241 232544 244712 249056 262288 266944 271115 280912 290680 301184 305890 311320 327860 333680 351140 357760 376480 403520 404716 433784 456482 465088 489424 498112 505895 524576 533888 542230 561824 581360 611780 622640 655720 667360 702280 704899 752960 754951 807040 809432 867568 912964 930176 978848 996224 1011790 1049152 1084460 1123648 1141205 1162720 1223560 1245280 1311440 1315327 1334720 1404560 1409798 1505920 1509902 1618864 1735136 1825928 1957696 2023580 2098304 2168920 2247296 2282410 2325440 2447120 2490560 2622880 2630654 2669440 2809120 2819596 2967133 3019804 3237728 3470272 3524495 3651856 3774755 3915392 4047160 4337840 4564820 4650880 4894240 4981120 5245760 5261308 5618240 5639192 5934266 6039608 6475456 6576635 6940544 7048990 7303712 7549510 8094320 8675680 9129640 9788480 9814363 10491520 10522616 11236480 11278384 11868532 12079216 12950912 13153270 14097980 14607424 14835665 15099020 16188640 17351360 18259280 19576960 19628726 21045232 22556768 23737064 24158432 26306540 28195960 29214848 29671330 30198040 32377280 34702720 36518560 39257452 42090464 45113536 47474128 48316864 49071815 52613080 56391920 59342660 60396080 64754560 73037120 78514904 84180928 90227072 94948256 96633728 98143630 105226160 112783840 118685320 120792160 127586719 146074240 157029808 168361856 189896512 196287260 210452320 225567680 237370640 241584320 255173438 314059616 379793024 392574520 420904640 451135360 474741280 483168640 510346876 628119232 637933595 785149040 841809280 949482560 1020693752 1256238464 1275867190 1570298080 1898965120 2041387504 2551734380 3140596160 4082775008 5103468760 6281192320 8165550016 10206937520 16331100032 20413875040 40827750080 81655500160
• Sum of all divisors σ(n): 219731672160
• Sum of proper divisors (its aliquot sum) s(n): 138076172000
• 81655500160 is an abundant number, because the sum of its proper divisors (138076172000) is greater than itself. Its abundance is 56420671840

Bases of 81655500160

• Binary: 1001100000011000011000000110110000000₂
• Hexadecimal: 0x13030C0D80
• Base-36: 11IFKR5S

Squares and roots of 81655500160

• 81655500160 squared (81655500160²) is 6667620706379760025600
• 81655500160 cubed (81655500160³) is 544447903656611807791142404096000
• The square root of 81655500160 is 285754.2653399945
• The cube root of 81655500160 is 4338.3889084015

Scales and comparisons

• 81,655,500,160 seconds is equal to 2,596 years, 20 weeks, 2 days, 19 hours, 22 minutes, 40 seconds.
• To count from 1 to 81,655,500,160 would take you about five thousand, one hundred ninety-two 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 81655500160 cubic inches would be around 361.5 feet tall.

Recreational maths with 81655500160

• 81655500160 backwards is 06100555618
• The number of decimal digits it has is: 11
• The sum of 81655500160's digits is 37
• More coming soon!