68931589371520 has 128 divisors (see below), whose sum is σ = 170002305123840. Its totient is φ = 26707124957184.

The previous prime is 68931589371497. The next prime is 68931589371569. The reversal of 68931589371520 is 2517398513986.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×68931589371520² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246182 + ... + 11807461.

It is an arithmetic number, because the mean of its divisors is an integer number (1328143008780).

Almost surely, 2^{68931589371520} is an apocalyptic number.

It is an amenable number.

68931589371520 is an abundant number, since it is smaller than the sum of its proper divisors (101070715752320).

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

68931589371520 is a wasteful number, since it uses less digits than its factorization.

68931589371520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13053922 (or 13053910 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 67.

The spelling of 68931589371520 in words is "sixty-eight trillion, nine hundred thirty-one billion, five hundred eighty-nine million, three hundred seventy-one thousand, five hundred twenty".