51679562840 has 64 divisors (see below), whose sum is σ = 117507157920. Its totient is φ = 20453760000.

The previous prime is 51679562833. The next prime is 51679562843. The reversal of 51679562840 is 4826597615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51679562843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8121260 + ... + 8127620.

Almost surely, 2^51679562840 is an apocalyptic number.

It is an amenable number.

51679562840 is an abundant number, since it is smaller than the sum of its proper divisors (65827595080).

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

51679562840 is a wasteful number, since it uses less digits than its factorization.

51679562840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8484 (or 8480 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 51679562840 in words is "fifty-one billion, six hundred seventy-nine million, five hundred sixty-two thousand, eight hundred forty".