809985137304 has 64 divisors (see below), whose sum is σ = 2394044755200. Its totient is φ = 223444174464.

The previous prime is 809985137303. The next prime is 809985137309. The reversal of 809985137304 is 403731589908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809985137303) 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 15 ways as a sum of consecutive naturals, for example, 83121682 + ... + 83131425.

It is an arithmetic number, because the mean of its divisors is an integer number (37406949300).

Almost surely, 2^809985137304 is an apocalyptic number.

809985137304 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

809985137304 is an abundant number, since it is smaller than the sum of its proper divisors (1584059617896).

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

809985137304 is a wasteful number, since it uses less digits than its factorization.

809985137304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166253152 (or 166253148 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 809985137304 in words is "eight hundred nine billion, nine hundred eighty-five million, one hundred thirty-seven thousand, three hundred four".