70931561856 has 32 divisors (see below), whose sum is σ = 188411962200. Its totient is φ = 23643853824.

The previous prime is 70931561839. The next prime is 70931561879. The reversal of 70931561856 is 65816513907.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 70931561799 and 70931561808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92358421 + ... + 92359188.

Almost surely, 2^70931561856 is an apocalyptic number.

It is an amenable number.

70931561856 is an abundant number, since it is smaller than the sum of its proper divisors (117480400344).

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

70931561856 is a wasteful number, since it uses less digits than its factorization.

70931561856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184717626 (or 184717614 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 51.

The spelling of 70931561856 in words is "seventy billion, nine hundred thirty-one million, five hundred sixty-one thousand, eight hundred fifty-six".