809664159 has 16 divisors (see below), whose sum is σ = 1103639040. Its totient is φ = 527756160.

The previous prime is 809664133. The next prime is 809664161. The reversal of 809664159 is 951466908.

It is not a de Polignac number, because 809664159 - 2²⁰ = 808615583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809664179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175239 + ... + 179799.

It is an arithmetic number, because the mean of its divisors is an integer number (68977440).

Almost surely, 2^809664159 is an apocalyptic number.

809664159 is a deficient number, since it is larger than the sum of its proper divisors (293974881).

809664159 is a wasteful number, since it uses less digits than its factorization.

809664159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 809664159 is about 28454.5982048596. The cubic root of 809664159 is about 932.0409023629.

The spelling of 809664159 in words is "eight hundred nine million, six hundred sixty-four thousand, one hundred fifty-nine".