636288433643 has 2 divisors, whose sum is σ = 636288433644. Its totient is φ = 636288433642.

The previous prime is 636288433609. The next prime is 636288433663. The reversal of 636288433643 is 346334882636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 636288433643 - 2²⁰ = 636287385067 is a prime.

It is not a weakly prime, because it can be changed into another prime (636288433663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318144216821 + 318144216822.

It is an arithmetic number, because the mean of its divisors is an integer number (318144216822).

Almost surely, 2^636288433643 is an apocalyptic number.

636288433643 is a deficient number, since it is larger than the sum of its proper divisors (1).

636288433643 is an equidigital number, since it uses as much as digits as its factorization.

636288433643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35831808, while the sum is 56.

The spelling of 636288433643 in words is "six hundred thirty-six billion, two hundred eighty-eight million, four hundred thirty-three thousand, six hundred forty-three".