51269716564 has 24 divisors (see below), whose sum is σ = 99257126976. Its totient is φ = 22976184000.

The previous prime is 51269716549. The next prime is 51269716567. The reversal of 51269716564 is 46561796215.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51269716567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8202657 + ... + 8208904.

It is an arithmetic number, because the mean of its divisors is an integer number (4135713624).

Almost surely, 2^51269716564 is an apocalyptic number.

It is an amenable number.

51269716564 is a deficient number, since it is larger than the sum of its proper divisors (47987410412).

51269716564 is a wasteful number, since it uses less digits than its factorization.

51269716564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16411647 (or 16411645 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 52.

The spelling of 51269716564 in words is "fifty-one billion, two hundred sixty-nine million, seven hundred sixteen thousand, five hundred sixty-four".