63955431761773 has 2 divisors, whose sum is σ = 63955431761774. Its totient is φ = 63955431761772.

The previous prime is 63955431761717. The next prime is 63955431761779. The reversal of 63955431761773 is 37716713455936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49805172769284 + 14150258992489 = 7057278^2 + 3761683^2 .

It is a cyclic number.

It is not a de Polignac number, because 63955431761773 - 2⁹ = 63955431761261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63955431761699 and 63955431761708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63955431761779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31977715880886 + 31977715880887.

It is an arithmetic number, because the mean of its divisors is an integer number (31977715880887).

Almost surely, 2^{63955431761773} is an apocalyptic number.

It is an amenable number.

63955431761773 is a deficient number, since it is larger than the sum of its proper divisors (1).

63955431761773 is an equidigital number, since it uses as much as digits as its factorization.

63955431761773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 300056400, while the sum is 67.

The spelling of 63955431761773 in words is "sixty-three trillion, nine hundred fifty-five billion, four hundred thirty-one million, seven hundred sixty-one thousand, seven hundred seventy-three".