809365865216 has 18 divisors (see below), whose sum is σ = 1615570145532. Its totient is φ = 404682932480.

The previous prime is 809365865213. The next prime is 809365865249. The reversal of 809365865216 is 612568563908.

It is not an unprimeable number, because it can be changed into a prime (809365865213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580792450 + ... + 1580792961.

It is an arithmetic number, because the mean of its divisors is an integer number (89753896974).

Almost surely, 2^809365865216 is an apocalyptic number.

It is an amenable number.

809365865216 is a deficient number, since it is larger than the sum of its proper divisors (806204280316).

809365865216 is an equidigital number, since it uses as much as digits as its factorization.

809365865216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161585427 (or 3161585413 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 809365865216 in words is "eight hundred nine billion, three hundred sixty-five million, eight hundred sixty-five thousand, two hundred sixteen".