12644183457 has 32 divisors (see below), whose sum is σ = 18807743360. Its totient is φ = 8395513920.

The previous prime is 12644183437. The next prime is 12644183467. The reversal of 12644183457 is 75438144621.

12644183457 is a `hidden beast` number, since 1 + 264 + 41 + 8 + 345 + 7 = 666.

It is not a de Polignac number, because 12644183457 - 2⁷ = 12644183329 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644183417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12383607 + ... + 12384627.

It is an arithmetic number, because the mean of its divisors is an integer number (587741980).

Almost surely, 2^12644183457 is an apocalyptic number.

It is an amenable number.

12644183457 is a deficient number, since it is larger than the sum of its proper divisors (6163559903).

12644183457 is a wasteful number, since it uses less digits than its factorization.

12644183457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430 (or 2424 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The spelling of 12644183457 in words is "twelve billion, six hundred forty-four million, one hundred eighty-three thousand, four hundred fifty-seven".