63955431761717 has 2 divisors, whose sum is σ = 63955431761718. Its totient is φ = 63955431761716.

The previous prime is 63955431761633. The next prime is 63955431761773. The reversal of 63955431761717 is 71716713455936.

63955431761717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41375885543281 + 22579546218436 = 6432409^2 + 4751794^2 .

It is a cyclic number.

It is not a de Polignac number, because 63955431761717 - 2⁸ = 63955431761461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63955431701717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31977715880858 + 31977715880859.

It is an arithmetic number, because the mean of its divisors is an integer number (31977715880859).

Almost surely, 2^{63955431761717} is an apocalyptic number.

It is an amenable number.

63955431761717 is a deficient number, since it is larger than the sum of its proper divisors (1).

63955431761717 is an equidigital number, since it uses as much as digits as its factorization.

63955431761717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100018800, while the sum is 65.

The spelling of 63955431761717 in words is "sixty-three trillion, nine hundred fifty-five billion, four hundred thirty-one million, seven hundred sixty-one thousand, seven hundred seventeen".