51512515104 has 48 divisors (see below), whose sum is σ = 135786188160. Its totient is φ = 17098986240.

The previous prime is 51512515097. The next prime is 51512515123. The reversal of 51512515104 is 40151521515.

51512515104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099627 + ... + 1145514.

It is an arithmetic number, because the mean of its divisors is an integer number (2828878920).

Almost surely, 2^51512515104 is an apocalyptic number.

It is an amenable number.

51512515104 is an abundant number, since it is smaller than the sum of its proper divisors (84273673056).

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

51512515104 is a wasteful number, since it uses less digits than its factorization.

51512515104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245393 (or 2245385 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 30.

The spelling of 51512515104 in words is "fifty-one billion, five hundred twelve million, five hundred fifteen thousand, one hundred four".