809223665816 has 16 divisors (see below), whose sum is σ = 1518967258440. Its totient is φ = 404165730240.

The previous prime is 809223665791. The next prime is 809223665839. The reversal of 809223665816 is 618566322908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55755125 + ... + 55769636.

Almost surely, 2^809223665816 is an apocalyptic number.

It is an amenable number.

809223665816 is a deficient number, since it is larger than the sum of its proper divisors (709743592624).

809223665816 is a wasteful number, since it uses less digits than its factorization.

809223665816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111525674 (or 111525670 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 56.

The spelling of 809223665816 in words is "eight hundred nine billion, two hundred twenty-three million, six hundred sixty-five thousand, eight hundred sixteen".