809404499568 has 40 divisors (see below), whose sum is σ = 2389670428288. Its totient is φ = 231258428352.

The previous prime is 809404499567. The next prime is 809404499569. The reversal of 809404499568 is 865994404908.

It is an interprime number because it is at equal distance from previous prime (809404499567) and next prime (809404499569).

It is a junction number, because it is equal to n+sod(n) for n = 809404499499 and 809404499508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809404499567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1204470646 + ... + 1204471317.

Almost surely, 2^809404499568 is an apocalyptic number.

It is an amenable number.

809404499568 is an abundant number, since it is smaller than the sum of its proper divisors (1580265928720).

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

809404499568 is a wasteful number, since it uses less digits than its factorization.

809404499568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408941981 (or 2408941975 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 66.

The spelling of 809404499568 in words is "eight hundred nine billion, four hundred four million, four hundred ninety-nine thousand, five hundred sixty-eight".