12549573863 has 4 divisors (see below), whose sum is σ = 12550862808. Its totient is φ = 12548284920.

The previous prime is 12549573851. The next prime is 12549573871. The reversal of 12549573863 is 36837594521.

It is a happy number.

12549573863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12549573863 - 2²⁰ = 12548525287 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 (12549573833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629756 + ... + 649377.

It is an arithmetic number, because the mean of its divisors is an integer number (3137715702).

Almost surely, 2^12549573863 is an apocalyptic number.

12549573863 is a deficient number, since it is larger than the sum of its proper divisors (1288945).

12549573863 is an equidigital number, since it uses as much as digits as its factorization.

12549573863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288944.

The product of its digits is 5443200, while the sum is 53.

The spelling of 12549573863 in words is "twelve billion, five hundred forty-nine million, five hundred seventy-three thousand, eight hundred sixty-three".