81672568920

Names of 81672568920

• Cardinal: 81672568920 can be written as Eighty-one billion, six hundred seventy-two million, five hundred sixty-eight thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.167256892 × 10¹⁰

Factors of 81672568920

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 51187

Divisors of 81672568920

• Number of divisors d(n): 320
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 17 18 20 24 27 29 30 34 36 40 45 51 54 58 60 68 72 81 85 87 90 102 108 116 120 135 136 145 153 162 170 174 180 204 216 232 255 261 270 290 306 324 340 348 360 405 408 435 459 493 510 522 540 580 612 648 680 696 765 783 810 870 918 986 1020 1044 1080 1160 1224 1305 1377 1479 1530 1566 1620 1740 1836 1972 2040 2088 2295 2349 2465 2610 2754 2958 3060 3132 3240 3480 3672 3915 3944 4437 4590 4698 4930 5220 5508 5916 6120 6264 6885 7395 7830 8874 9180 9396 9860 10440 11016 11745 11832 13311 13770 14790 15660 17748 18360 18792 19720 22185 23490 26622 27540 29580 31320 35496 39933 44370 46980 51131 53244 55080 59160 66555 79866 88740 93960 102262 106488 133110 153393 159732 177480 199665 204524 255655 266220 306786 319464 399330 409048 460179 511310 532440 613572 766965 798660 869227 920358 1022620 1227144 1380537 1482799 1533930 1597320 1738454 1840716 2045240 2300895 2607681 2761074 2965598 3067860 3476908 3681432 4141611 4346135 4448397 4601790 5215362 5522148 5931196 6135720 6902685 6953816 7413995 7823043 8283222 8692270 8896794 9203580 10430724 11044296 11862392 13038405 13345191 13805370 14827990 15646086 16566444 17384540 17793588 18407160 20708055 20861448 22241985 23469129 25207583 26076810 26690382 27610740 29655980 31292172 33132888 34769080 35587176 39115215 40035573 41416110 44483970 46938258 50415166 52153620 53380764 55221480 59311960 62584344 66725955 70407387 75622749 78230430 80071146 82832220 88967940 93876516 100830332 104307240 106761528 117345645 120106719 126037915 133451910 140814774 151245498 156460860 160142292 165664440 177935880 187753032 200177865 201660664 226868247 234691290 240213438 252075830 266903820 281629548 302490996 312921720 320284584 352036935 378113745 400355730 453736494 469382580 480426876 504151660 533807640 563259096 600533595 604981992 680604741 704073870 756227490 800711460 907472988 938765160 960853752 1008303320 1134341235 1201067190 1361209482 1408147740 1512454980 1601422920 1814945976 2041814223 2268682470 2402134380 2722418964 2816295480 3024909960 3403023705 4083628446 4537364940 4804268760 5444837928 6806047410 8167256892 9074729880 10209071115 13612094820 16334513784 20418142230 27224189640 40836284460 81672568920
• Sum of all divisors σ(n): 300686839200
• Sum of proper divisors (its aliquot sum) s(n): 219014270280
• 81672568920 is an abundant number, because the sum of its proper divisors (219014270280) is greater than itself. Its abundance is 137341701360

Bases of 81672568920

• Binary: 1001100000100000100001000000001011000₂
• Hexadecimal: 0x1304108058
• Base-36: 11IPQLI0

Squares and roots of 81672568920

• 81672568920 squared (81672568920²) is 6670408513992149966400
• 81672568920 cubed (81672568920³) is 544789399083578652469779684288000
• The square root of 81672568920 is 285784.1299302675
• The cube root of 81672568920 is 4338.6911773231

Scales and comparisons

• 81,672,568,920 seconds is equal to 2,596 years, 48 weeks, 4 days, 8 hours, 42 minutes.
• To count from 1 to 81,672,568,920 would take you about five thousand, one hundred ninety-three 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 81672568920 cubic inches would be around 361.6 feet tall.

Recreational maths with 81672568920

• 81672568920 backwards is 02986527618
• 81672568920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81672568920's digits is 54
• More coming soon!