81500048721

Names of 81500048721

• Cardinal: 81500048721 can be written as Eighty-one billion, five hundred million, forty-eight thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 8.1500048721 × 10¹⁰

Factors of 81500048721

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 149

Divisors of 81500048721

• Number of divisors d(n): 288
• Complete list of divisors:
  1 3 7 9 13 17 21 27 39 51 63 81 91 109 117 119 153 169 189 221 243 273 289 327 351 357 459 507 567 663 729 763 819 867 981 1053 1071 1183 1377 1417 1521 1547 1701 1853 1989 2023 2187 2289 2457 2601 2873 2943 3159 3213 3549 3757 4131 4251 4563 4641 5103 5559 5967 6069 6867 7371 7803 8619 8829 9477 9639 9919 10647 11271 12393 12753 12971 13689 13923 15309 16677 17901 18207 18421 20111 20601 22113 23409 24089 25857 26299 26487 28431 28917 29757 31501 31941 33813 37179 38259 38913 41067 41769 48841 50031 53703 54621 55263 60333 61803 66339 70227 72267 77571 78897 79461 86751 89271 94503 95823 101439 114777 116739 123201 125307 128947 146523 150093 161109 163863 165789 168623 180999 185409 199017 210681 216801 220507 232713 236691 238383 260253 267813 283509 287469 304317 313157 341887 344331 350217 369603 375921 386841 409513 439569 450279 483327 491589 497367 505869 542997 556227 632043 650403 661521 698139 710073 803439 850527 862407 912951 939471 1025661 1032993 1050651 1127763 1160523 1228539 1318707 1350837 1474767 1492101 1517607 1628991 1668681 1951209 1984563 2094417 2130219 2192099 2410317 2551581 2587221 2738853 2818413 2866591 3076983 3098979 3151953 3383289 3481569 3685617 3956121 4052511 4424301 4476303 4552821 4886973 5323669 5853627 5953689 6283251 6390657 6576297 7230951 7654743 8216559 8455239 8599773 9230949 9455859 10444707 11056851 11868363 13428909 13658463 14660919 15971007 17560881 17861067 19171971 19728891 21692853 22964229 25365717 25799319 27692847 28367577 31334121 33170553 35605089 37265683 40286727 40975389 43982757 47913021 52682643 53583201 57515913 59186673 68892687 76097151 77397957 83078541 94002363 99511659 106815267 111797049 122926167 143739063 160749603 177560019 228291453 232193871 249235623 282007089 298534977 335391147 368778501 431217189 482248809 532680057 684874359 696581613 747706869 895604931 1006173441 1293651567 1598040171 2089744839 3018520323 3880954701 4794120513 6269234517 9055560969 11642864103 27166682907 81500048721
• Sum of all divisors σ(n): 162160838400
• Sum of proper divisors (its aliquot sum) s(n): 80660789679
• 81500048721 is a deficient number, because the sum of its proper divisors (80660789679) is less than itself. Its deficiency is 839259042

Bases of 81500048721

• Binary: 1001011111001110010000000110101010001₂
• Hexadecimal: 0x12F9C80D51
• Base-36: 11FV0W29

Squares and roots of 81500048721

• 81500048721 squared (81500048721²) is 6642257941525373735841
• 81500048721 cubed (81500048721³) is 541344345851767128528775283909361
• The square root of 81500048721 is 285482.1338035009
• The cube root of 81500048721 is 4335.6340940957

Scales and comparisons

• 81,500,048,721 seconds is equal to 2,591 years, 23 weeks, 2 days, 14 hours, 25 minutes, 21 seconds.
• To count from 1 to 81,500,048,721 would take you about five thousand, one hundred eighty-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 81500048721 cubic inches would be around 361.3 feet tall.

Recreational maths with 81500048721

• 81500048721 backwards is 12784000518
• The number of decimal digits it has is: 11
• The sum of 81500048721's digits is 36
• More coming soon!