812044943320 has 64 divisors (see below), whose sum is σ = 1967749096320. Its totient is φ = 299816477184.

The previous prime is 812044943299. The next prime is 812044943341. The reversal of 812044943320 is 23349440218.

It is an interprime number because it is at equal distance from previous prime (812044943299) and next prime (812044943341).

It is a Harshad number since it is a multiple of its sum of digits (40).

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 15 ways as a sum of consecutive naturals, for example, 16676529 + ... + 16725151.

It is an arithmetic number, because the mean of its divisors is an integer number (30746079630).

Almost surely, 2^812044943320 is an apocalyptic number.

It is an amenable number.

812044943320 is an abundant number, since it is smaller than the sum of its proper divisors (1155704153000).

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

812044943320 is a wasteful number, since it uses less digits than its factorization.

812044943320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80764 (or 80760 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 812044943320 in words is "eight hundred twelve billion, forty-four million, nine hundred forty-three thousand, three hundred twenty".