811965812 has 24 divisors (see below), whose sum is σ = 1633328256. Its totient is φ = 345971808.

The previous prime is 811965793. The next prime is 811965821. The reversal of 811965812 is 218569118.

811965812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 811965812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78968 + ... + 88655.

It is an arithmetic number, because the mean of its divisors is an integer number (68055344).

Almost surely, 2^811965812 is an apocalyptic number.

It is an amenable number.

811965812 is an abundant number, since it is smaller than the sum of its proper divisors (821362444).

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

811965812 is a wasteful number, since it uses less digits than its factorization.

811965812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167807 (or 167805 counting only the distinct ones).

The product of its digits is 34560, while the sum is 41.

The square root of 811965812 is about 28495.0138094369. The cubic root of 811965812 is about 932.9232456358.

The spelling of 811965812 in words is "eight hundred eleven million, nine hundred sixty-five thousand, eight hundred twelve".