813291839352 has 80 divisors (see below), whose sum is σ = 2279498676840. Its totient is φ = 270915378624.

The previous prime is 813291839329. The next prime is 813291839359. The reversal of 813291839352 is 253938192318.

813291839352 is a `hidden beast` number, since 8 + 1 + 329 + 183 + 93 + 52 = 666.

It is a super-2 number, since 2×813291839352² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813291839359) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 547143 + ... + 1387785.

Almost surely, 2^813291839352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813291839352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1139749338420).

813291839352 is an abundant number, since it is smaller than the sum of its proper divisors (1466206837488).

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

813291839352 is a wasteful number, since it uses less digits than its factorization.

813291839352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842154 (or 842141 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 813291839352 in words is "eight hundred thirteen billion, two hundred ninety-one million, eight hundred thirty-nine thousand, three hundred fifty-two".