51905404832 has 12 divisors (see below), whose sum is σ = 102188765826. Its totient is φ = 25952702400.

The previous prime is 51905404777. The next prime is 51905404843. The reversal of 51905404832 is 23840450915.

51905404832 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 37792915216 + 14112489616 = 194404^2 + 118796^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51905404832.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 811021919 + ... + 811021982.

Almost surely, 2^51905404832 is an apocalyptic number.

It is an amenable number.

51905404832 is a deficient number, since it is larger than the sum of its proper divisors (50283360994).

51905404832 is a wasteful number, since it uses less digits than its factorization.

51905404832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622043911 (or 1622043903 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 51905404832 in words is "fifty-one billion, nine hundred five million, four hundred four thousand, eight hundred thirty-two".