51868531507870 has 32 divisors (see below), whose sum is σ = 116401068112896. Its totient is φ = 16166815015200.

The previous prime is 51868531507831. The next prime is 51868531507901. The reversal of 51868531507870 is 7870513586815.

51868531507870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 33680863846 + ... + 33680865385.

It is an arithmetic number, because the mean of its divisors is an integer number (3637533378528).

Almost surely, 2^{51868531507870} is an apocalyptic number.

51868531507870 is an abundant number, since it is smaller than the sum of its proper divisors (64532536605026).

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

51868531507870 is a wasteful number, since it uses less digits than its factorization.

51868531507870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67361729256.

The product of its (nonzero) digits is 56448000, while the sum is 64.

The spelling of 51868531507870 in words is "fifty-one trillion, eight hundred sixty-eight billion, five hundred thirty-one million, five hundred seven thousand, eight hundred seventy".