51538334904 has 96 divisors (see below), whose sum is σ = 163233333120. Its totient is φ = 14382785088.

The previous prime is 51538334833. The next prime is 51538334941. The reversal of 51538334904 is 40943383515.

51538334904 is a `hidden beast` number, since 5 + 153 + 8 + 3 + 3 + 490 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51538334904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1167382 + ... + 1210725.

It is an arithmetic number, because the mean of its divisors is an integer number (1700347220).

Almost surely, 2^51538334904 is an apocalyptic number.

It is an amenable number.

51538334904 is an abundant number, since it is smaller than the sum of its proper divisors (111694998216).

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

51538334904 is a wasteful number, since it uses less digits than its factorization.

51538334904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378169 (or 2378162 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 51538334904 in words is "fifty-one billion, five hundred thirty-eight million, three hundred thirty-four thousand, nine hundred four".