12205291585 has 16 divisors (see below), whose sum is σ = 14972947200. Its totient is φ = 9546918016.

The previous prime is 12205291543. The next prime is 12205291621. The reversal of 12205291585 is 58519250221.

It is a cyclic number.

It is not a de Polignac number, because 12205291585 - 2²⁷ = 12071073857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213981 + ... + 264949.

It is an arithmetic number, because the mean of its divisors is an integer number (935809200).

Almost surely, 2^12205291585 is an apocalyptic number.

It is an amenable number.

12205291585 is a deficient number, since it is larger than the sum of its proper divisors (2767655615).

12205291585 is a wasteful number, since it uses less digits than its factorization.

12205291585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52040.

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 12205291585 in words is "twelve billion, two hundred five million, two hundred ninety-one thousand, five hundred eighty-five".