12585021695 has 4 divisors (see below), whose sum is σ = 15102026040. Its totient is φ = 10068017352.

The previous prime is 12585021679. The next prime is 12585021737. The reversal of 12585021695 is 59612058521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12585021695 - 2⁴ = 12585021679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258502165 + ... + 1258502174.

It is an arithmetic number, because the mean of its divisors is an integer number (3775506510).

Almost surely, 2^12585021695 is an apocalyptic number.

12585021695 is a deficient number, since it is larger than the sum of its proper divisors (2517004345).

12585021695 is an equidigital number, since it uses as much as digits as its factorization.

12585021695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2517004344.

The product of its (nonzero) digits is 216000, while the sum is 44.

The spelling of 12585021695 in words is "twelve billion, five hundred eighty-five million, twenty-one thousand, six hundred ninety-five".