81977840100

Names of 81977840100

• Cardinal: 81977840100 can be written as Eighty-one billion, nine hundred seventy-seven million, eight hundred forty thousand, one hundred.

Scientific notation

• Scientific notation: 8.19778401 × 10¹⁰

Factors of 81977840100

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 510

Divisors of 81977840100

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 25 26 27 30 36 37 39 45 50 52 53 54 60 65 74 75 78 81 90 100 106 108 111 117 130 135 148 150 156 159 162 180 185 195 212 222 225 234 260 265 270 300 318 324 325 333 351 370 390 397 405 444 450 468 477 481 530 540 555 585 636 650 666 675 689 702 740 780 794 795 810 900 925 954 962 975 999 1053 1060 1110 1170 1191 1300 1325 1332 1350 1378 1404 1431 1443 1588 1590 1620 1665 1755 1850 1908 1924 1950 1961 1985 1998 2025 2067 2106 2220 2340 2382 2385 2405 2650 2700 2756 2775 2862 2886 2925 2997 3180 3330 3445 3510 3573 3700 3900 3922 3970 3975 3996 4050 4134 4212 4293 4329 4764 4770 4810 4995 5161 5265 5300 5550 5724 5772 5850 5883 5955 5994 6201 6660 6890 7020 7146 7155 7215 7844 7940 7950 8100 8268 8325 8586 8658 8775 9540 9620 9805 9925 9990 10322 10335 10530 10719 11100 11700 11766 11910 11925 11988 12025 12402 12987 13780 14292 14310 14430 14689 14985 15483 15900 16650 17172 17225 17316 17550 17649 17865 18603 19610 19850 19980 20644 20670 21041 21060 21438 21465 21645 23532 23820 23850 24050 24804 24975 25493 25805 25974 26325 28620 28860 29378 29415 29775 29970 30966 31005 32157 33300 34450 35100 35298 35730 35775 36075 37206 38961 39220 39700 41340 42082 42876 42930 43290 44067 46449 47700 48100 49025 49950 50986 51610 51675 51948 52650 52947 53595 55809 58756 58830 59550 59940 61932 62010 63123 64314 64935 68900 70596 71460 71550 72150 73445 74412 74925 76479 77415 77922 84164 85860 86580 88134 88245 89325 92898 93015 98050 99900 101972 103220 103350 105205 105300 105894 107190 107325 108225 111618 117660 119100 124020 126246 127465 128628 129025 129870 132201 139347 143100 144300 146890 147075 149850 152958 154830 155025 155844 158841 160785 176268 176490 178650 185796 186030 189369 190957 194805 196100 206700 210410 211788 214380 214650 216450 220335 223236 229437 232245 252492 254930 258050 259740 264402 264735 267975 273533 278694 279045 293780 294150 299700 305916 309660 310050 315615 317682 321570 324675 352980 357300 367225 372060 378738 381914 382395 387075 389610 396603 418041 420820 429300 432900 440670 441225 458874 464490 465075 509860 516100 526025 528804 529470 535950 547066 557388 558090 568107 572871 588300 620100 631230 635364 637325 643140 649350 661005 688311 696735 734450 757476 763828 764790 774150 778517 779220 793206 794205 803925 820599 836082 881340 882450 917748 928980 930150 946845 954785 974025 1052050 1058940 1071900 1094132 1101675 1116180 1136214 1145742 1147185 1161225 1189809 1262460 1274650 1298700 1322010 1323675 1367665 1376622 1393470 1395225 1468900 1529580 1548300 1557034 1578075 1586412 1588410 1607850 1641198 1672164 1704321 1718613 1764900 1860300 1893690 1909570 1911975 1948050 1983015 2064933 2090205 2104100 2203350 2272428 2291484 2294370 2322450 2335551 2379618 2461797 2549300 2644020 2647350 2735330 2753244 2786940 2790450 2840535 2864355 3114068 3156150 3176820 3215700 3282396 3305025 3408642 3437226 3441555 3483675 3787380 3819140 3823950 3892585 3896100 3966030 3971025 4102995 4129866 4180410 4406700 4588740 4644900 4671102 4734225 4759236 4773925 4923594 5155839 5294700 5470660 5580900 5681070 5728710 5735925 5949045 6312300 6610050 6817284 6838325 6874452 6883110 6967350 7006653 7385391 7647900 7785170 7932060 7942050 8205990 8259732 8360820 8521605 8593065 9342204 9468450 9547850 9847188 9915075 10120721 10311678 10324665 10451025 11362140 11457420 11471850 11677755 11898090 12308985 13220100 13676650 13766220 13934700 14013306 14202675 14321775 14770782 15467517 15570340 15884100 16411980 17043210 17186130 17207775 18936900 19095700 19462925 19830150 20241442 20514975 20623356 20649330 20902050 21019959 22156173 22943700 23355510 23796180 24617970 25779195 27353300 28026612 28405350 28643550 29541564 29745225 30362163 30935034 34086420 34372260 34415550 35033265 36926955 38925850 39660300 40482884 41029950 41298660 41804100 42039918 42608025 42965325 44312346 46711020 49235940 50603605 51558390 51623325 56810700 57287100 58388775 59490450 60724326 61544925 61870068 63059877 68831100 70066530 73853910 77337585 77851700 82059900 84079836 85216050 85930650 88624692 91086489 101207210 103116780 103246650 105099795 110780865 116777550 118980900 121448652 123089850 126119754 128895975 140133060 147707820 151810815 154675170 170432100 171861300 175166325 182172978 184634775 202414420 206493300 210199590 221561730 233555100 246179700 252239508 253018025 257791950 273259467 303621630 309350340 315299385 350332650 364345956 369269550 386687925 420399180 443123460 455432445 506036050 515583900 525498975 546518934 553904325 607243260 630598770 700665300 738539100 759054075 773375850 819778401 910864890 1012072100 1050997950 1093037868 1107808650 1261197540 1366297335 1518108150 1546751700 1576496925 1639556802 1821729780 2101995900 2215617300 2277162225 2732594670 3036216300 3152993850 3279113604 4098892005 4554324450 5465189340 6305987700 6831486675 8197784010 9108648900 13662973350 16395568020 20494460025 27325946700 40988920050 81977840100
• Sum of all divisors σ(n): 300215816208
• Sum of proper divisors (its aliquot sum) s(n): 218237976108
• 81977840100 is an abundant number, because the sum of its proper divisors (218237976108) is greater than itself. Its abundance is 136260136008

Bases of 81977840100

• Binary: 1001100010110010000101001000111100100₂
• Hexadecimal: 0x13164291E4
• Base-36: 11NRHM90

Squares and roots of 81977840100

• 81977840100 squared (81977840100²) is 6720366267461168010000
• 81977840100 cubed (81977840100³) is 550921111287365464083015201000000
• The square root of 81977840100 is 286317.7257872797
• The cube root of 81977840100 is 4344.0900957321

Scales and comparisons

• 81,977,840,100 seconds is equal to 2,606 years, 33 weeks, 2 days, 14 hours, 15 minutes.
• To count from 1 to 81,977,840,100 would take you about five thousand, two hundred thirteen 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 81977840100 cubic inches would be around 362 feet tall.

Recreational maths with 81977840100

• 81977840100 backwards is 00104877918
• 81977840100 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81977840100's digits is 45
• More coming soon!