56905121328 has 40 divisors (see below), whose sum is σ = 160368979776. Its totient is φ = 17243976000.

The previous prime is 56905121281. The next prime is 56905121341. The reversal of 56905121328 is 82312150965.

It is a self number, because there is not a number n which added to its sum of digits gives 56905121328.

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, 53886898 + ... + 53887953.

Almost surely, 2^56905121328 is an apocalyptic number.

It is an amenable number.

56905121328 is an abundant number, since it is smaller than the sum of its proper divisors (103463858448).

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

56905121328 is a wasteful number, since it uses less digits than its factorization.

56905121328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107774873 (or 107774867 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 56905121328 in words is "fifty-six billion, nine hundred five million, one hundred twenty-one thousand, three hundred twenty-eight".