809663264 has 24 divisors (see below), whose sum is σ = 1677921840. Its totient is φ = 383524416.

The previous prime is 809663263. The next prime is 809663269. The reversal of 809663264 is 462366908.

It is a super-2 number, since 2×809663264² = 1311109202142267392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (809663263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665234 + ... + 666449.

It is an arithmetic number, because the mean of its divisors is an integer number (69913410).

Almost surely, 2^809663264 is an apocalyptic number.

It is an amenable number.

809663264 is an abundant number, since it is smaller than the sum of its proper divisors (868258576).

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

809663264 is a wasteful number, since it uses less digits than its factorization.

809663264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331712 (or 1331704 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 809663264 is about 28454.5824780474. The cubic root of 809663264 is about 932.0405589378.

The spelling of 809663264 in words is "eight hundred nine million, six hundred sixty-three thousand, two hundred sixty-four".