811876564 has 12 divisors (see below), whose sum is σ = 1430320500. Its totient is φ = 403213568.

The previous prime is 811876477. The next prime is 811876567. The reversal of 811876564 is 465678118.

It can be written as a sum of positive squares in 2 ways, for example, as 356907664 + 454968900 = 18892^2 + 21330^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811876567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 680509 + ... + 681700.

It is an arithmetic number, because the mean of its divisors is an integer number (119193375).

Almost surely, 2^811876564 is an apocalyptic number.

It is an amenable number.

811876564 is a deficient number, since it is larger than the sum of its proper divisors (618443936).

811876564 is a wasteful number, since it uses less digits than its factorization.

811876564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362362 (or 1362360 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 811876564 is about 28493.4477380327. The cubic root of 811876564 is about 932.8890633327.

The spelling of 811876564 in words is "eight hundred eleven million, eight hundred seventy-six thousand, five hundred sixty-four".