809664036 has 24 divisors (see below), whose sum is σ = 1889836704. Its totient is φ = 269799360.

The previous prime is 809664029. The next prime is 809664067. The reversal of 809664036 is 630466908.

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, 34456 + ... + 52976.

It is an arithmetic number, because the mean of its divisors is an integer number (78743196).

Almost surely, 2^809664036 is an apocalyptic number.

It is an amenable number.

809664036 is an abundant number, since it is smaller than the sum of its proper divisors (1080172668).

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

809664036 is a wasteful number, since it uses less digits than its factorization.

809664036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22171 (or 22169 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 809664036 is about 28454.5960435217. The cubic root of 809664036 is about 932.0408551659.

The spelling of 809664036 in words is "eight hundred nine million, six hundred sixty-four thousand, thirty-six".