813535568 has 20 divisors (see below), whose sum is σ = 1577205600. Its totient is φ = 406514784.

The previous prime is 813535529. The next prime is 813535621. The reversal of 813535568 is 865535318.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12221 + ... + 42147.

It is an arithmetic number, because the mean of its divisors is an integer number (78860280).

Almost surely, 2^813535568 is an apocalyptic number.

It is an amenable number.

813535568 is a deficient number, since it is larger than the sum of its proper divisors (763670032).

813535568 is a wasteful number, since it uses less digits than its factorization.

813535568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31634 (or 31628 counting only the distinct ones).

The product of its digits is 432000, while the sum is 44.

The square root of 813535568 is about 28522.5449074938. The cubic root of 813535568 is about 933.5240587553.

The spelling of 813535568 in words is "eight hundred thirteen million, five hundred thirty-five thousand, five hundred sixty-eight".