51944707664 has 40 divisors (see below), whose sum is σ = 104153214720. Its totient is φ = 25067145600.

The previous prime is 51944707631. The next prime is 51944707679. The reversal of 51944707664 is 46670744915.

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 7 ways as a sum of consecutive naturals, for example, 1274969 + ... + 1315079.

It is an arithmetic number, because the mean of its divisors is an integer number (2603830368).

Almost surely, 2^51944707664 is an apocalyptic number.

It is an amenable number.

51944707664 is an abundant number, since it is smaller than the sum of its proper divisors (52208507056).

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

51944707664 is a wasteful number, since it uses less digits than its factorization.

51944707664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42939 (or 42933 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 51944707664 in words is "fifty-one billion, nine hundred forty-four million, seven hundred seven thousand, six hundred sixty-four".