12565440853 has 8 divisors (see below), whose sum is σ = 14362820672. Its totient is φ = 10768640256.

The previous prime is 12565440821. The next prime is 12565440869. The reversal of 12565440853 is 35804456521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12565440853 - 2⁵ = 12565440821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565440883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97275 + ... + 185992.

It is an arithmetic number, because the mean of its divisors is an integer number (1795352584).

Almost surely, 2^12565440853 is an apocalyptic number.

It is an amenable number.

12565440853 is a deficient number, since it is larger than the sum of its proper divisors (1797379819).

12565440853 is an equidigital number, since it uses as much as digits as its factorization.

12565440853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289611.

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 12565440853 in words is "twelve billion, five hundred sixty-five million, four hundred forty thousand, eight hundred fifty-three".