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68305250895 = 35717192014013
BaseRepresentation
bin111111100111010011…
…110110101001001111
320112022022101021011020
4333213103312221033
52104342121012040
651213510325223
74635445024110
oct774723665117
9215268337136
1068305250895
1126a71595a82
12112a3359813
1365972b912b
14343d8da207
151b9b947cd0
hexfe74f6a4f

68305250895 has 64 divisors (see below), whose sum is σ = 139208647680. Its totient is φ = 27841701888.

The previous prime is 68305250843. The next prime is 68305250953. The reversal of 68305250895 is 59805250386.

It is not a de Polignac number, because 68305250895 - 214 = 68305234511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 973092 + ... + 1040921.

It is an arithmetic number, because the mean of its divisors is an integer number (2175135120).

Almost surely, 268305250895 is an apocalyptic number.

68305250895 is an abundant number, since it is smaller than the sum of its proper divisors (70903396785).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68305250895 is a wasteful number, since it uses less digits than its factorization.

68305250895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014064.

The product of its (nonzero) digits is 2592000, while the sum is 51.

The spelling of 68305250895 in words is "sixty-eight billion, three hundred five million, two hundred fifty thousand, eight hundred ninety-five".

Divisors: 1 3 5 7 15 17 19 21 35 51 57 85 95 105 119 133 255 285 323 357 399 595 665 969 1615 1785 1995 2261 4845 6783 11305 33915 2014013 6042039 10070065 14098091 30210195 34238221 38266247 42294273 70490455 102714663 114798741 171191105 191331235 211471365 239667547 267863729 513573315 573993705 650526199 719002641 803591187 1198337735 1339318645 1951578597 3252630995 3595013205 4017955935 4553683393 9757892985 13661050179 22768416965 68305250895