51718764 has 12 divisors (see below), whose sum is σ = 120677144. Its totient is φ = 17239584.

The previous prime is 51718739. The next prime is 51718769. The reversal of 51718764 is 46781715.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (51718769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2154937 + ... + 2154960.

Almost surely, 2^51718764 is an apocalyptic number.

It is an amenable number.

51718764 is an abundant number, since it is smaller than the sum of its proper divisors (68958380).

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

51718764 is a wasteful number, since it uses less digits than its factorization.

51718764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309904 (or 4309902 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 51718764 is about 7191.5759051824. The cubic root of 51718764 is about 372.5770037344.

The spelling of 51718764 in words is "fifty-one million, seven hundred eighteen thousand, seven hundred sixty-four".