51000505556504 has 32 divisors (see below), whose sum is σ = 109290348554400. Its totient is φ = 21856649337600.

The previous prime is 51000505556437. The next prime is 51000505556519. The reversal of 51000505556504 is 40565550500015.

It is a happy number.

It is a congruent number.

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, 13054847 + ... + 16505454.

It is an arithmetic number, because the mean of its divisors is an integer number (3415323392325).

Almost surely, 2^{51000505556504} is an apocalyptic number.

It is an amenable number.

51000505556504 is an abundant number, since it is smaller than the sum of its proper divisors (58289842997896).

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

51000505556504 is a wasteful number, since it uses less digits than its factorization.

51000505556504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29591123 (or 29591119 counting only the distinct ones).

The product of its (nonzero) digits is 375000, while the sum is 41.

The spelling of 51000505556504 in words is "fifty-one trillion, five hundred five million, five hundred fifty-six thousand, five hundred four".