51644926680 has 64 divisors (see below), whose sum is σ = 155552140800. Its totient is φ = 13717104000.

The previous prime is 51644926679. The next prime is 51644926691. The reversal of 51644926680 is 8662944615.

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, 827200 + ... + 887439.

It is an arithmetic number, because the mean of its divisors is an integer number (2430502200).

Almost surely, 2^51644926680 is an apocalyptic number.

It is an amenable number.

51644926680 is an abundant number, since it is smaller than the sum of its proper divisors (103907214120).

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

51644926680 is a wasteful number, since it uses less digits than its factorization.

51644926680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714904 (or 1714900 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 51644926680 in words is "fifty-one billion, six hundred forty-four million, nine hundred twenty-six thousand, six hundred eighty".