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68500926865 = 5722931127481
BaseRepresentation
bin111111110010111110…
…010011000110010001
320112210221120122010101
4333302332103012101
52110242214124430
651245140332401
74643342162020
oct776276230621
9215727518111
1068500926865
1127061a95258
12113389a4101
1365c89bb227
14345b8b48b7
151badbeadca
hexff2f93191

68500926865 has 32 divisors (see below), whose sum is σ = 94661199360. Its totient is φ = 46614873600.

The previous prime is 68500926847. The next prime is 68500926869. The reversal of 68500926865 is 56862900586.

It is not a de Polignac number, because 68500926865 - 29 = 68500926353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68500926869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2478925 + ... + 2506405.

It is an arithmetic number, because the mean of its divisors is an integer number (2958162480).

Almost surely, 268500926865 is an apocalyptic number.

It is an amenable number.

68500926865 is a deficient number, since it is larger than the sum of its proper divisors (26160272495).

68500926865 is a wasteful number, since it uses less digits than its factorization.

68500926865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28033.

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 68500926865 in words is "sixty-eight billion, five hundred million, nine hundred twenty-six thousand, eight hundred sixty-five".

Divisors: 1 5 7 35 229 311 1145 1555 1603 2177 8015 10885 27481 71219 137405 192367 356095 498533 961835 2492665 6293149 8546591 31465745 42732955 44052043 59826137 220260215 299130685 1957169339 9785846695 13700185373 68500926865