12636544 has 32 divisors (see below), whose sum is σ = 25336800. Its totient is φ = 6277632.

The previous prime is 12636529. The next prime is 12636551. The reversal of 12636544 is 44563621.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34249 + ... + 34615.

It is an arithmetic number, because the mean of its divisors is an integer number (791775).

Almost surely, 2^12636544 is an apocalyptic number.

It is an amenable number.

12636544 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

12636544 is an equidigital number, since it uses as much as digits as its factorization.

12636544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 638 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 12636544 is about 3554.7916957256. The cubic root of 12636544 is about 232.9214247503.

The spelling of 12636544 in words is "twelve million, six hundred thirty-six thousand, five hundred forty-four".