51564536125 has 16 divisors (see below), whose sum is σ = 64597268736. Its totient is φ = 41094752400.

The previous prime is 51564536117. The next prime is 51564536143. The reversal of 51564536125 is 52163546515.

It is a happy number.

It is not a de Polignac number, because 51564536125 - 2³ = 51564536117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751377 + ... + 817126.

It is an arithmetic number, because the mean of its divisors is an integer number (4037329296).

Almost surely, 2^51564536125 is an apocalyptic number.

It is an amenable number.

51564536125 is a deficient number, since it is larger than the sum of its proper divisors (13032732611).

51564536125 is a wasteful number, since it uses less digits than its factorization.

51564536125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568781 (or 1568771 counting only the distinct ones).

The product of its digits is 540000, while the sum is 43.

The spelling of 51564536125 in words is "fifty-one billion, five hundred sixty-four million, five hundred thirty-six thousand, one hundred twenty-five".