51869979824 has 40 divisors (see below), whose sum is σ = 110531467200. Its totient is φ = 23430624768.

The previous prime is 51869979779. The next prime is 51869979827. The reversal of 51869979824 is 42897996815.

It is not an unprimeable number, because it can be changed into a prime (51869979827) 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, 2643149 + ... + 2662700.

It is an arithmetic number, because the mean of its divisors is an integer number (2763286680).

Almost surely, 2^51869979824 is an apocalyptic number.

It is an amenable number.

51869979824 is an abundant number, since it is smaller than the sum of its proper divisors (58661487376).

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

51869979824 is a wasteful number, since it uses less digits than its factorization.

51869979824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305917 (or 5305911 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 68.

The spelling of 51869979824 in words is "fifty-one billion, eight hundred sixty-nine million, nine hundred seventy-nine thousand, eight hundred twenty-four".