813171243834 has 48 divisors (see below), whose sum is σ = 1780082759520. Its totient is φ = 268257592800.

The previous prime is 813171243827. The next prime is 813171243847. The reversal of 813171243834 is 438342171318.

813171243834 is a `hidden beast` number, since 8 + 13 + 171 + 2 + 438 + 34 = 666.

It is a super-2 number, since 2×813171243834² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813171243834.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4171557 + ... + 4362135.

It is an arithmetic number, because the mean of its divisors is an integer number (37085057490).

Almost surely, 2^813171243834 is an apocalyptic number.

813171243834 is an abundant number, since it is smaller than the sum of its proper divisors (966911515686).

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

813171243834 is a wasteful number, since it uses less digits than its factorization.

813171243834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193035 (or 193032 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The spelling of 813171243834 in words is "eight hundred thirteen billion, one hundred seventy-one million, two hundred forty-three thousand, eight hundred thirty-four".