63959538898993 has 2 divisors, whose sum is σ = 63959538898994. Its totient is φ = 63959538898992.

The previous prime is 63959538898919. The next prime is 63959538898999. The reversal of 63959538898993 is 39989883595936.

63959538898993 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., 46834409283489 + 17125129615504 = 6843567^2 + 4138252^2 .

It is a cyclic number.

It is not a de Polignac number, because 63959538898993 - 2³⁷ = 63822099945521 is a prime.

It is not a weakly prime, because it can be changed into another prime (63959538898999) 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, 31979769449496 + 31979769449497.

It is an arithmetic number, because the mean of its divisors is an integer number (31979769449497).

Almost surely, 2^{63959538898993} is an apocalyptic number.

It is an amenable number.

63959538898993 is a deficient number, since it is larger than the sum of its proper divisors (1).

63959538898993 is an equidigital number, since it uses as much as digits as its factorization.

63959538898993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122444006400, while the sum is 94.

The spelling of 63959538898993 in words is "sixty-three trillion, nine hundred fifty-nine billion, five hundred thirty-eight million, eight hundred ninety-eight thousand, nine hundred ninety-three".