56561205764 has 24 divisors (see below), whose sum is σ = 115881497088. Its totient is φ = 23649284160.

The previous prime is 56561205751. The next prime is 56561205781. The reversal of 56561205764 is 46750216565.

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, 24633524 + ... + 24635819.

It is an arithmetic number, because the mean of its divisors is an integer number (4828395712).

Almost surely, 2^56561205764 is an apocalyptic number.

It is an amenable number.

56561205764 is an abundant number, since it is smaller than the sum of its proper divisors (59320291324).

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

56561205764 is a wasteful number, since it uses less digits than its factorization.

56561205764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49269395 (or 49269393 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 56561205764 in words is "fifty-six billion, five hundred sixty-one million, two hundred five thousand, seven hundred sixty-four".