51565056611 has 2 divisors, whose sum is σ = 51565056612. Its totient is φ = 51565056610.

The previous prime is 51565056601. The next prime is 51565056643. The reversal of 51565056611 is 11665056515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51565056611 - 2¹⁴ = 51565040227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (51565056601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25782528305 + 25782528306.

It is an arithmetic number, because the mean of its divisors is an integer number (25782528306).

Almost surely, 2^51565056611 is an apocalyptic number.

51565056611 is a deficient number, since it is larger than the sum of its proper divisors (1).

51565056611 is an equidigital number, since it uses as much as digits as its factorization.

51565056611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 51565056611 in words is "fifty-one billion, five hundred sixty-five million, fifty-six thousand, six hundred eleven".