811985056 has 24 divisors (see below), whose sum is σ = 1614429684. Its totient is φ = 401971200.

The previous prime is 811985023. The next prime is 811985063. The reversal of 811985056 is 650589118.

It can be written as a sum of positive squares in 2 ways, for example, as 744416656 + 67568400 = 27284^2 + 8220^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122385 + ... + 128848.

Almost surely, 2^811985056 is an apocalyptic number.

It is an amenable number.

811985056 is a deficient number, since it is larger than the sum of its proper divisors (802444628).

811985056 is a wasteful number, since it uses less digits than its factorization.

811985056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251344 (or 251336 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 811985056 is about 28495.3514805485. The cubic root of 811985056 is about 932.9306158284.

The spelling of 811985056 in words is "eight hundred eleven million, nine hundred eighty-five thousand, fifty-six".