51399112478764 has 12 divisors (see below), whose sum is σ = 89948766522888. Its totient is φ = 25699464900800.

The previous prime is 51399112478759. The next prime is 51399112478801. The reversal of 51399112478764 is 46787421199315.

51399112478764 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51399112478764.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21560602 + ... + 23825569.

It is an arithmetic number, because the mean of its divisors is an integer number (7495730543574).

Almost surely, 2^{51399112478764} is an apocalyptic number.

It is an amenable number.

51399112478764 is a deficient number, since it is larger than the sum of its proper divisors (38549654044124).

51399112478764 is a wasteful number, since it uses less digits than its factorization.

51399112478764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45669296 (or 45669294 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 67.

The spelling of 51399112478764 in words is "fifty-one trillion, three hundred ninety-nine billion, one hundred twelve million, four hundred seventy-eight thousand, seven hundred sixty-four".