56507551065 has 48 divisors (see below), whose sum is σ = 117830294400. Its totient is φ = 24472440576.

The previous prime is 56507551049. The next prime is 56507551151. The reversal of 56507551065 is 56015570565.

56507551065 is a `hidden beast` number, since 5 + 6 + 5 + 0 + 75 + 510 + 65 = 666.

It is not a de Polignac number, because 56507551065 - 2⁴ = 56507551049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56507551065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4714780 + ... + 4726749.

It is an arithmetic number, because the mean of its divisors is an integer number (2454797800).

Almost surely, 2^56507551065 is an apocalyptic number.

It is an amenable number.

56507551065 is an abundant number, since it is smaller than the sum of its proper divisors (61322743335).

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

56507551065 is a wasteful number, since it uses less digits than its factorization.

56507551065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9441566 (or 9441563 counting only the distinct ones).

The product of its (nonzero) digits is 787500, while the sum is 45.

The spelling of 56507551065 in words is "fifty-six billion, five hundred seven million, five hundred fifty-one thousand, sixty-five".