51564585012 has 48 divisors (see below), whose sum is σ = 120652519680. Its totient is φ = 17140375168.

The previous prime is 51564585001. The next prime is 51564585073. The reversal of 51564585012 is 21058546515.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9666298 + ... + 9671630.

It is an arithmetic number, because the mean of its divisors is an integer number (2513594160).

Almost surely, 2^51564585012 is an apocalyptic number.

It is an amenable number.

51564585012 is an abundant number, since it is smaller than the sum of its proper divisors (69087934668).

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

51564585012 is a wasteful number, since it uses less digits than its factorization.

51564585012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7432 (or 7430 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 51564585012 in words is "fifty-one billion, five hundred sixty-four million, five hundred eighty-five thousand, twelve".