51665505155107 has 2 divisors, whose sum is σ = 51665505155108. Its totient is φ = 51665505155106.

The previous prime is 51665505155051. The next prime is 51665505155191. The reversal of 51665505155107 is 70155150556615.

51665505155107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51665505155107 - 2¹⁵ = 51665505122339 is a prime.

It is not a weakly prime, because it can be changed into another prime (51665505156107) by changing a digit.

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 as a sum of consecutive naturals, namely, 25832752577553 + 25832752577554.

It is an arithmetic number, because the mean of its divisors is an integer number (25832752577554).

Almost surely, 2^{51665505155107} is an apocalyptic number.

51665505155107 is a deficient number, since it is larger than the sum of its proper divisors (1).

51665505155107 is an equidigital number, since it uses as much as digits as its factorization.

51665505155107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3937500, while the sum is 52.

The spelling of 51665505155107 in words is "fifty-one trillion, six hundred sixty-five billion, five hundred five million, one hundred fifty-five thousand, one hundred seven".