811800792000 has 672 divisors, whose sum is σ = 3285359610624. Its totient is φ = 196795008000.

The previous prime is 811800791993. The next prime is 811800792071. The reversal of 811800792000 is 297008118.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21365019 + ... + 21402981.

It is an arithmetic number, because the mean of its divisors is an integer number (4888927992).

Almost surely, 2^811800792000 is an apocalyptic number.

811800792000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811800792000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642679805312).

811800792000 is an abundant number, since it is smaller than the sum of its proper divisors (2473558818624).

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

811800792000 is a wasteful number, since it uses less digits than its factorization.

811800792000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38016 (or 37984 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The spelling of 811800792000 in words is "eight hundred eleven billion, eight hundred million, seven hundred ninety-two thousand".