51928139904 has 32 divisors (see below), whose sum is σ = 137934122640. Its totient is φ = 17309379840.

The previous prime is 51928139903. The next prime is 51928139909. The reversal of 51928139904 is 40993182915.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (51928139903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67614382 + ... + 67615149.

Almost surely, 2^51928139904 is an apocalyptic number.

It is an amenable number.

51928139904 is an abundant number, since it is smaller than the sum of its proper divisors (86005982736).

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

51928139904 is a wasteful number, since it uses less digits than its factorization.

51928139904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135229548 (or 135229536 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 51.

The spelling of 51928139904 in words is "fifty-one billion, nine hundred twenty-eight million, one hundred thirty-nine thousand, nine hundred four".