809430944500 has 24 divisors (see below), whose sum is σ = 1767797183880. Its totient is φ = 323772377600.

The previous prime is 809430944459. The next prime is 809430944501. The reversal of 809430944500 is 5449034908.

It can be written as a sum of positive squares in 4 ways, for example, as 34657779556 + 774773164944 = 186166^2 + 880212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809430944501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809430445 + ... + 809431444.

It is an arithmetic number, because the mean of its divisors is an integer number (73658215995).

Almost surely, 2^809430944500 is an apocalyptic number.

It is an amenable number.

809430944500 is an abundant number, since it is smaller than the sum of its proper divisors (958366239380).

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

809430944500 is a wasteful number, since it uses less digits than its factorization.

809430944500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618861908 (or 1618861896 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 809430944500 in words is "eight hundred nine billion, four hundred thirty million, nine hundred forty-four thousand, five hundred".