813188027832 has 32 divisors (see below), whose sum is σ = 2034691537680. Its totient is φ = 270833146880.

The previous prime is 813188027819. The next prime is 813188027843. The reversal of 813188027832 is 238720881318.

It is a super-2 number, since 2×813188027832² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14316633 + ... + 14373320.

Almost surely, 2^813188027832 is an apocalyptic number.

It is an amenable number.

813188027832 is an abundant number, since it is smaller than the sum of its proper divisors (1221503509848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813188027832 is a wasteful number, since it uses less digits than its factorization.

813188027832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28691143 (or 28691139 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 813188027832 in words is "eight hundred thirteen billion, one hundred eighty-eight million, twenty-seven thousand, eight hundred thirty-two".