56861769520 has 20 divisors (see below), whose sum is σ = 132203614320. Its totient is φ = 22744707776.

The previous prime is 56861769511. The next prime is 56861769533. The reversal of 56861769520 is 2596716865.

It is a tau number, because it is divible by the number of its divisors (20).

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, 355385980 + ... + 355386139.

It is an arithmetic number, because the mean of its divisors is an integer number (6610180716).

Almost surely, 2^56861769520 is an apocalyptic number.

It is an amenable number.

56861769520 is an abundant number, since it is smaller than the sum of its proper divisors (75341844800).

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

56861769520 is a wasteful number, since it uses less digits than its factorization.

56861769520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710772132 (or 710772126 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 56861769520 in words is "fifty-six billion, eight hundred sixty-one million, seven hundred sixty-nine thousand, five hundred twenty".