51631064640164 has 24 divisors (see below), whose sum is σ = 93500567239800. Its totient is φ = 24917198503680.

The previous prime is 51631064640143. The next prime is 51631064640203. The reversal of 51631064640164 is 46104646013615.

51631064640164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5908584454564 + 45722480185600 = 2430758^2 + 6761840^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72349169 + ... + 73059320.

It is an arithmetic number, because the mean of its divisors is an integer number (3895856968325).

Almost surely, 2^{51631064640164} is an apocalyptic number.

It is an amenable number.

51631064640164 is a deficient number, since it is larger than the sum of its proper divisors (41869502599636).

51631064640164 is a wasteful number, since it uses less digits than its factorization.

51631064640164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145411583 (or 145411581 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 51631064640164 in words is "fifty-one trillion, six hundred thirty-one billion, sixty-four million, six hundred forty thousand, one hundred sixty-four".