12563566849 has 16 divisors (see below), whose sum is σ = 12853074240. Its totient is φ = 12276855360.

The previous prime is 12563566837. The next prime is 12563566879. The reversal of 12563566849 is 94866536521.

It is a cyclic number.

It is not a de Polignac number, because 12563566849 - 2¹¹ = 12563564801 is a prime.

It is a Duffinian number.

Its product of digits (9331200) is a multiple of the sum of its prime divisors (2160).

It is a self number, because there is not a number n which added to its sum of digits gives 12563566849.

It is not an unprimeable number, because it can be changed into a prime (12563566879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10802142 + ... + 10803304.

It is an arithmetic number, because the mean of its divisors is an integer number (803317140).

Almost surely, 2^12563566849 is an apocalyptic number.

It is an amenable number.

12563566849 is a deficient number, since it is larger than the sum of its proper divisors (289507391).

12563566849 is a wasteful number, since it uses less digits than its factorization.

12563566849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its digits is 9331200, while the sum is 55.

The spelling of 12563566849 in words is "twelve billion, five hundred sixty-three million, five hundred sixty-six thousand, eight hundred forty-nine".