51665505155156 has 24 divisors (see below), whose sum is σ = 95750730895680. Its totient is φ = 24308711851392.

The previous prime is 51665505155107. The next prime is 51665505155191. The reversal of 51665505155156 is 65155150556615.

51665505155156 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 7 ways as a sum of consecutive naturals, for example, 69424736 + ... + 70164983.

It is an arithmetic number, because the mean of its divisors is an integer number (3989613787320).

Almost surely, 2^{51665505155156} is an apocalyptic number.

It is an amenable number.

51665505155156 is a deficient number, since it is larger than the sum of its proper divisors (44085225740524).

51665505155156 is a wasteful number, since it uses less digits than its factorization.

51665505155156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139595183 (or 139595181 counting only the distinct ones).

The product of its (nonzero) digits is 16875000, while the sum is 56.

The spelling of 51665505155156 in words is "fifty-one trillion, six hundred sixty-five billion, five hundred five million, one hundred fifty-five thousand, one hundred fifty-six".