12644066025 has 36 divisors (see below), whose sum is σ = 22825300992. Its totient is φ = 6690388320.

The previous prime is 12644066011. The next prime is 12644066041. The reversal of 12644066025 is 52066044621.

12644066025 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 40 + 6 + 602 + 5 = 666.

12644066025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12644066025 - 2⁶ = 12644065961 is a prime.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 192669 + ... + 249818.

Almost surely, 2^12644066025 is an apocalyptic number.

12644066025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12644066025 is a deficient number, since it is larger than the sum of its proper divisors (10181234967).

12644066025 is a wasteful number, since it uses less digits than its factorization.

12644066025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442630 (or 442622 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 12644066025 in words is "twelve billion, six hundred forty-four million, sixty-six thousand, twenty-five".