813187969264 has 40 divisors (see below), whose sum is σ = 1727508526128. Its totient is φ = 367754580480.

The previous prime is 813187969229. The next prime is 813187969267. The reversal of 813187969264 is 462969781318.

It is a super-2 number, since 2×813187969264² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 813187969196 and 813187969205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813187969267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11692197 + ... + 11761540.

Almost surely, 2^813187969264 is an apocalyptic number.

It is an amenable number.

813187969264 is an abundant number, since it is smaller than the sum of its proper divisors (914320556864).

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

813187969264 is a wasteful number, since it uses less digits than its factorization.

813187969264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23453953 (or 23453947 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 64.

The spelling of 813187969264 in words is "eight hundred thirteen billion, one hundred eighty-seven million, nine hundred sixty-nine thousand, two hundred sixty-four".