63955431761779 has 2 divisors, whose sum is σ = 63955431761780. Its totient is φ = 63955431761778.

The previous prime is 63955431761773. The next prime is 63955431761783. The reversal of 63955431761779 is 97716713455936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63955431761779 - 2³¹ = 63953284278131 is a prime.

It is not a weakly prime, because it can be changed into another prime (63955431761773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31977715880889 + 31977715880890.

It is an arithmetic number, because the mean of its divisors is an integer number (31977715880890).

Almost surely, 2^{63955431761779} is an apocalyptic number.

63955431761779 is a deficient number, since it is larger than the sum of its proper divisors (1).

63955431761779 is an equidigital number, since it uses as much as digits as its factorization.

63955431761779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900169200, while the sum is 73.

The spelling of 63955431761779 in words is "sixty-three trillion, nine hundred fifty-five billion, four hundred thirty-one million, seven hundred sixty-one thousand, seven hundred seventy-nine".