809802782920 has 32 divisors (see below), whose sum is σ = 1825292646720. Its totient is φ = 323345755840.

The previous prime is 809802782869. The next prime is 809802782933. The reversal of 809802782920 is 29287208908.

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, 17957116 + ... + 18002155.

It is an arithmetic number, because the mean of its divisors is an integer number (57040395210).

Almost surely, 2^809802782920 is an apocalyptic number.

It is an amenable number.

809802782920 is an abundant number, since it is smaller than the sum of its proper divisors (1015489863800).

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

809802782920 is a wasteful number, since it uses less digits than its factorization.

809802782920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35959845 (or 35959841 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 809802782920 in words is "eight hundred nine billion, eight hundred two million, seven hundred eighty-two thousand, nine hundred twenty".