51039547873665 has 32 divisors (see below), whose sum is σ = 87957036518400. Its totient is φ = 25123742198016.

The previous prime is 51039547873637. The next prime is 51039547873681. The reversal of 51039547873665 is 56637874593015.

51039547873665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51039547873665 - 2⁸ = 51039547873409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51039547873665.

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 31 ways as a sum of consecutive naturals, for example, 16374897 + ... + 19241006.

It is an arithmetic number, because the mean of its divisors is an integer number (2748657391200).

Almost surely, 2^{51039547873665} is an apocalyptic number.

It is an amenable number.

51039547873665 is a deficient number, since it is larger than the sum of its proper divisors (36917488644735).

51039547873665 is a wasteful number, since it uses less digits than its factorization.

51039547873665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35623273.

The product of its (nonzero) digits is 571536000, while the sum is 69.

The spelling of 51039547873665 in words is "fifty-one trillion, thirty-nine billion, five hundred forty-seven million, eight hundred seventy-three thousand, six hundred sixty-five".