811764875136 has 384 divisors, whose sum is σ = 2391334112160. Its totient is φ = 242996346880.

The previous prime is 811764875111. The next prime is 811764875167. The reversal of 811764875136 is 631578467118.

811764875136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-3 number, since 3×811764875136³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 591233746 + ... + 591235118.

Almost surely, 2^811764875136 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 811764875136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195667056080).

811764875136 is an abundant number, since it is smaller than the sum of its proper divisors (1579569237024).

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

811764875136 is a wasteful number, since it uses less digits than its factorization.

811764875136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 1483 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 57.

The spelling of 811764875136 in words is "eight hundred eleven billion, seven hundred sixty-four million, eight hundred seventy-five thousand, one hundred thirty-six".