811580994 has 24 divisors (see below), whose sum is σ = 2009629440. Its totient is φ = 231880248.

The previous prime is 811580989. The next prime is 811580999. The reversal of 811580994 is 499085118.

It is an interprime number because it is at equal distance from previous prime (811580989) and next prime (811580999).

It is not an unprimeable number, because it can be changed into a prime (811580999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3220434 + ... + 3220685.

It is an arithmetic number, because the mean of its divisors is an integer number (83734560).

Almost surely, 2^811580994 is an apocalyptic number.

811580994 is an abundant number, since it is smaller than the sum of its proper divisors (1198048446).

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

811580994 is a wasteful number, since it uses less digits than its factorization.

811580994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6441134 (or 6441131 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 811580994 is about 28488.2606348650. The cubic root of 811580994 is about 932.7758410768.

The spelling of 811580994 in words is "eight hundred eleven million, five hundred eighty thousand, nine hundred ninety-four".