2585173664 has 24 divisors (see below), whose sum is σ = 5090698368. Its totient is φ = 1292297920.

The previous prime is 2585173621. The next prime is 2585173667. The reversal of 2585173664 is 4663715852.

It is not an unprimeable number, because it can be changed into a prime (2585173667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256529 + ... + 266415.

It is an arithmetic number, because the mean of its divisors is an integer number (212112432).

Almost surely, 2^2585173664 is an apocalyptic number.

It is an amenable number.

2585173664 is a deficient number, since it is larger than the sum of its proper divisors (2505524704).

2585173664 is an equidigital number, since it uses as much as digits as its factorization.

2585173664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18068 (or 18060 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 47.

The square root of 2585173664 is about 50844.6030961006. The cubic root of 2585173664 is about 1372.4501352041.

The spelling of 2585173664 in words is "two billion, five hundred eighty-five million, one hundred seventy-three thousand, six hundred sixty-four".