51636778759 has 2 divisors, whose sum is σ = 51636778760. Its totient is φ = 51636778758.

The previous prime is 51636778729. The next prime is 51636778783. The reversal of 51636778759 is 95787763615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51636778759 - 2⁵ = 51636778727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51636778759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51636778729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25818389379 + 25818389380.

It is an arithmetic number, because the mean of its divisors is an integer number (25818389380).

Almost surely, 2^51636778759 is an apocalyptic number.

51636778759 is a deficient number, since it is larger than the sum of its proper divisors (1).

51636778759 is an equidigital number, since it uses as much as digits as its factorization.

51636778759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66679200, while the sum is 64.

The spelling of 51636778759 in words is "fifty-one billion, six hundred thirty-six million, seven hundred seventy-eight thousand, seven hundred fifty-nine".