51811104377563 has 2 divisors, whose sum is σ = 51811104377564. Its totient is φ = 51811104377562.

The previous prime is 51811104377479. The next prime is 51811104377597. The reversal of 51811104377563 is 36577340111815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51811104377563 - 2³³ = 51802514442971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51811104377563.

It is not a weakly prime, because it can be changed into another prime (51811104377363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25905552188781 + 25905552188782.

It is an arithmetic number, because the mean of its divisors is an integer number (25905552188782).

Almost surely, 2^{51811104377563} is an apocalyptic number.

51811104377563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51811104377563 is an equidigital number, since it uses as much as digits as its factorization.

51811104377563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 51811104377563 in words is "fifty-one trillion, eight hundred eleven billion, one hundred four million, three hundred seventy-seven thousand, five hundred sixty-three".