208864716563 has 2 divisors, whose sum is σ = 208864716564. Its totient is φ = 208864716562.

The previous prime is 208864716553. The next prime is 208864716569. The reversal of 208864716563 is 365617468802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 208864716563 - 2⁴ = 208864716547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 208864716499 and 208864716508.

It is not a weakly prime, because it can be changed into another prime (208864716569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104432358281 + 104432358282.

It is an arithmetic number, because the mean of its divisors is an integer number (104432358282).

Almost surely, 2^208864716563 is an apocalyptic number.

208864716563 is a deficient number, since it is larger than the sum of its proper divisors (1).

208864716563 is an equidigital number, since it uses as much as digits as its factorization.

208864716563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 208864716563 in words is "two hundred eight billion, eight hundred sixty-four million, seven hundred sixteen thousand, five hundred sixty-three".