636942675223 has 2 divisors, whose sum is σ = 636942675224. Its totient is φ = 636942675222.

The previous prime is 636942675209. The next prime is 636942675227. The reversal of 636942675223 is 322576249636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 636942675223 - 2⁵ = 636942675191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636942675227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318471337611 + 318471337612.

It is an arithmetic number, because the mean of its divisors is an integer number (318471337612).

Almost surely, 2^636942675223 is an apocalyptic number.

636942675223 is a deficient number, since it is larger than the sum of its proper divisors (1).

636942675223 is an equidigital number, since it uses as much as digits as its factorization.

636942675223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 55.

The spelling of 636942675223 in words is "six hundred thirty-six billion, nine hundred forty-two million, six hundred seventy-five thousand, two hundred twenty-three".