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68604932571 = 3731895692081
BaseRepresentation
bin111111111001001011…
…000011000111011011
320120002012021200010120
4333321023003013123
52111000330320241
651303333444323
74646044206450
oct777113030733
9216065250116
1068604932571
112710577228a
12113677a06a3
136614405076
14346b629827
151bb7de2666
hexff92c31db

68604932571 has 64 divisors (see below), whose sum is σ = 109369958400. Its totient is φ = 37428019200.

The previous prime is 68604932569. The next prime is 68604932587. The reversal of 68604932571 is 17523940686.

68604932571 is a nontrivial binomial coefficient, being equal to C(370419, 2).

It is not a de Polignac number, because 68604932571 - 21 = 68604932569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68604932531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32966251 + ... + 32968331.

It is an arithmetic number, because the mean of its divisors is an integer number (1708905600).

It is a 2-persistent number, because it is pandigital, and so is 2⋅68604932571 = 137209865142, but 3⋅68604932571 = 205814797713 is not.

Almost surely, 268604932571 is an apocalyptic number.

68604932571 is the 370418-th triangular number.

68604932571 is a deficient number, since it is larger than the sum of its proper divisors (40765025829).

68604932571 is a wasteful number, since it uses less digits than its factorization.

68604932571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 68604932571 in words is "sixty-eight billion, six hundred four million, nine hundred thirty-two thousand, five hundred seventy-one".

Divisors: 1 3 7 21 31 89 93 217 267 569 623 651 1707 1869 2081 2759 3983 6243 8277 11949 14567 17639 19313 43701 50641 52917 57939 64511 123473 151923 185209 193533 354487 370419 451577 555627 1063461 1184089 1296463 1354731 1569871 3552267 3889389 4709613 5741479 8288623 10989097 17224437 24865869 32967291 36706759 40190353 105383921 110120277 120571059 256947313 316151763 737687447 770841939 2213062341 3266901551 9800704653 22868310857 68604932571