12644343853992 has 48 divisors (see below), whose sum is σ = 34245867932640. Its totient is φ = 4214686516128.

The previous prime is 12644343853969. The next prime is 12644343854027. The reversal of 12644343853992 is 29935834344621.

12644343853992 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 4 + 3 + 4 + 3 + 8 + 539 + 92 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1287213 + ... + 5190915.

It is an arithmetic number, because the mean of its divisors is an integer number (713455581930).

Almost surely, 2^{12644343853992} is an apocalyptic number.

12644343853992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12644343853992 is an abundant number, since it is smaller than the sum of its proper divisors (21601524078648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12644343853992 is a wasteful number, since it uses less digits than its factorization.

12644343853992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948702 (or 3948695 counting only the distinct ones).

The product of its digits is 134369280, while the sum is 63.

The spelling of 12644343853992 in words is "twelve trillion, six hundred forty-four billion, three hundred forty-three million, eight hundred fifty-three thousand, nine hundred ninety-two".