2585985609 has 4 divisors (see below), whose sum is σ = 3447980816. Its totient is φ = 1723990404.

The previous prime is 2585985539. The next prime is 2585985631. The reversal of 2585985609 is 9065895852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2585985609 - 2²¹ = 2583888457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2585985509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430997599 + ... + 430997604.

It is an arithmetic number, because the mean of its divisors is an integer number (861995204).

Almost surely, 2^2585985609 is an apocalyptic number.

It is an amenable number.

2585985609 is a deficient number, since it is larger than the sum of its proper divisors (861995207).

2585985609 is an equidigital number, since it uses as much as digits as its factorization.

2585985609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861995206.

The product of its (nonzero) digits is 7776000, while the sum is 57.

The square root of 2585985609 is about 50852.5870433354. The cubic root of 2585985609 is about 1372.5938054207.

The spelling of 2585985609 in words is "two billion, five hundred eighty-five million, nine hundred eighty-five thousand, six hundred nine".