813857389046 has 16 divisors (see below), whose sum is σ = 1325044621824. Its totient is φ = 372668796864.

The previous prime is 813857389043. The next prime is 813857389049. The reversal of 813857389046 is 640983758318.

It is an interprime number because it is at equal distance from previous prime (813857389043) and next prime (813857389049).

It is a self number, because there is not a number n which added to its sum of digits gives 813857389046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813857389043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123233735 + ... + 123240338.

It is an arithmetic number, because the mean of its divisors is an integer number (82815288864).

Almost surely, 2^813857389046 is an apocalyptic number.

813857389046 is a deficient number, since it is larger than the sum of its proper divisors (511187232778).

813857389046 is a wasteful number, since it uses less digits than its factorization.

813857389046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246474215.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 813857389046 in words is "eight hundred thirteen billion, eight hundred fifty-seven million, three hundred eighty-nine thousand, forty-six".