51631361532 has 36 divisors (see below), whose sum is σ = 131008878000. Its totient is φ = 17145011712.

The previous prime is 51631361513. The next prime is 51631361609. The reversal of 51631361532 is 23516313615.

51631361532 is a `hidden beast` number, since 5 + 1 + 6 + 3 + 1 + 3 + 615 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 2717157 + ... + 2736092.

It is an arithmetic number, because the mean of its divisors is an integer number (3639135500).

Almost surely, 2^51631361532 is an apocalyptic number.

It is an amenable number.

51631361532 is an abundant number, since it is smaller than the sum of its proper divisors (79377516468).

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

51631361532 is a wasteful number, since it uses less digits than its factorization.

51631361532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5453522 (or 5453517 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The spelling of 51631361532 in words is "fifty-one billion, six hundred thirty-one million, three hundred sixty-one thousand, five hundred thirty-two".