63856971326563 has 2 divisors, whose sum is σ = 63856971326564. Its totient is φ = 63856971326562.

The previous prime is 63856971326521. The next prime is 63856971326573. The reversal of 63856971326563 is 36562317965836.

63856971326563 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63856971326563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63856971326492 and 63856971326501.

It is not a weakly prime, because it can be changed into another prime (63856971326573) 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, 31928485663281 + 31928485663282.

It is an arithmetic number, because the mean of its divisors is an integer number (31928485663282).

Almost surely, 2^{63856971326563} is an apocalyptic number.

63856971326563 is a deficient number, since it is larger than the sum of its proper divisors (1).

63856971326563 is an equidigital number, since it uses as much as digits as its factorization.

63856971326563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 881798400, while the sum is 70.

The spelling of 63856971326563 in words is "sixty-three trillion, eight hundred fifty-six billion, nine hundred seventy-one million, three hundred twenty-six thousand, five hundred sixty-three".