813136432572 has 36 divisors (see below), whose sum is σ = 2089123754536. Its totient is φ = 266602108320.

The previous prime is 813136432417. The next prime is 813136432583. The reversal of 813136432572 is 275234631318.

813136432572 is a `hidden beast` number, since 8 + 1 + 3 + 1 + 36 + 43 + 2 + 572 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×813136432572² (a number of 25 digits) contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 185138158 + ... + 185142549.

Almost surely, 2^813136432572 is an apocalyptic number.

It is an amenable number.

813136432572 is an abundant number, since it is smaller than the sum of its proper divisors (1275987321964).

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

813136432572 is a wasteful number, since it uses less digits than its factorization.

813136432572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370280778 (or 370280773 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 813136432572 in words is "eight hundred thirteen billion, one hundred thirty-six million, four hundred thirty-two thousand, five hundred seventy-two".