51596821952 has 112 divisors (see below), whose sum is σ = 118899127200. Its totient is φ = 22010019840.

The previous prime is 51596821949. The next prime is 51596821961. The reversal of 51596821952 is 25912869515.

It is a junction number, because it is equal to n+sod(n) for n = 51596821894 and 51596821903.

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, 608324 + ... + 687932.

It is an arithmetic number, because the mean of its divisors is an integer number (1061599350).

Almost surely, 2^51596821952 is an apocalyptic number.

51596821952 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51596821952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59449563600).

51596821952 is an abundant number, since it is smaller than the sum of its proper divisors (67302305248).

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

51596821952 is a wasteful number, since it uses less digits than its factorization.

51596821952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79694 (or 79684 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 53.

The spelling of 51596821952 in words is "fifty-one billion, five hundred ninety-six million, eight hundred twenty-one thousand, nine hundred fifty-two".