51021970008 has 32 divisors (see below), whose sum is σ = 129302257200. Its totient is φ = 16774345728.

The previous prime is 51021969989. The next prime is 51021970123. The reversal of 51021970008 is 80007912015.

51021970008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14559313 + ... + 14562816.

Almost surely, 2^51021970008 is an apocalyptic number.

It is an amenable number.

51021970008 is an abundant number, since it is smaller than the sum of its proper divisors (78280287192).

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

51021970008 is a wasteful number, since it uses less digits than its factorization.

51021970008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29122211 (or 29122207 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The spelling of 51021970008 in words is "fifty-one billion, twenty-one million, nine hundred seventy thousand, eight".