213664025863 has 2 divisors, whose sum is σ = 213664025864. Its totient is φ = 213664025862.

The previous prime is 213664025857. The next prime is 213664025891. The reversal of 213664025863 is 368520466312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213664025863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213664025833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106832012931 + 106832012932.

It is an arithmetic number, because the mean of its divisors is an integer number (106832012932).

Almost surely, 2^213664025863 is an apocalyptic number.

213664025863 is a deficient number, since it is larger than the sum of its proper divisors (1).

213664025863 is an equidigital number, since it uses as much as digits as its factorization.

213664025863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 213664025863 in words is "two hundred thirteen billion, six hundred sixty-four million, twenty-five thousand, eight hundred sixty-three".