809404499511 has 12 divisors (see below), whose sum is σ = 1237912764192. Its totient is φ = 507861646656.

The previous prime is 809404499503. The next prime is 809404499537. The reversal of 809404499511 is 115994404908.

809404499511 is a `hidden beast` number, since 80 + 9 + 4 + 0 + 4 + 49 + 9 + 511 = 666.

It is not a de Polignac number, because 809404499511 - 2³ = 809404499503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809404499311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2645112591 + ... + 2645112896.

It is an arithmetic number, because the mean of its divisors is an integer number (103159397016).

Almost surely, 2^809404499511 is an apocalyptic number.

809404499511 is a deficient number, since it is larger than the sum of its proper divisors (428508264681).

809404499511 is a wasteful number, since it uses less digits than its factorization.

809404499511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290225510 (or 5290225507 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 809404499511 in words is "eight hundred nine billion, four hundred four million, four hundred ninety-nine thousand, five hundred eleven".