63564905613917 has 2 divisors, whose sum is σ = 63564905613918. Its totient is φ = 63564905613916.

The previous prime is 63564905613851. The next prime is 63564905613961. The reversal of 63564905613917 is 71931650946536.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63393858024676 + 171047589241 = 7962026^2 + 413579^2 .

It is a cyclic number.

It is not a de Polignac number, because 63564905613917 - 2²⁰ = 63564904565341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63564905612917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31782452806958 + 31782452806959.

It is an arithmetic number, because the mean of its divisors is an integer number (31782452806959).

Almost surely, 2^{63564905613917} is an apocalyptic number.

It is an amenable number.

63564905613917 is a deficient number, since it is larger than the sum of its proper divisors (1).

63564905613917 is an equidigital number, since it uses as much as digits as its factorization.

63564905613917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110224800, while the sum is 65.

The spelling of 63564905613917 in words is "sixty-three trillion, five hundred sixty-four billion, nine hundred five million, six hundred thirteen thousand, nine hundred seventeen".