813556306375 has 16 divisors (see below), whose sum is σ = 1015766492832. Its totient is φ = 650557723200.

The previous prime is 813556306301. The next prime is 813556306391. The reversal of 813556306375 is 573603655318.

It is a de Polignac number, because none of the positive numbers 2^k-813556306375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1152102 + ... + 1718851.

It is an arithmetic number, because the mean of its divisors is an integer number (63485405802).

Almost surely, 2^813556306375 is an apocalyptic number.

813556306375 is a deficient number, since it is larger than the sum of its proper divisors (202210186457).

813556306375 is a wasteful number, since it uses less digits than its factorization.

813556306375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873235 (or 2873225 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 52.

The spelling of 813556306375 in words is "eight hundred thirteen billion, five hundred fifty-six million, three hundred six thousand, three hundred seventy-five".