813686318 has 16 divisors (see below), whose sum is σ = 1282154400. Its totient is φ = 386539296.

The previous prime is 813686311. The next prime is 813686329.

813686318 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813686311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52505 + ... + 66212.

It is an arithmetic number, because the mean of its divisors is an integer number (80134650).

Almost surely, 2^813686318 is an apocalyptic number.

813686318 is a deficient number, since it is larger than the sum of its proper divisors (468468082).

813686318 is a wasteful number, since it uses less digits than its factorization.

813686318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118891.

The product of its digits is 165888, while the sum is 44.

The square root of 813686318 is about 28525.1874314613. The cubic root of 813686318 is about 933.5817165746.

The spelling of 813686318 in words is "eight hundred thirteen million, six hundred eighty-six thousand, three hundred eighteen".