12644433875608 has 16 divisors (see below), whose sum is σ = 23783103154080. Its totient is φ = 6302273034528.

The previous prime is 12644433875561. The next prime is 12644433875629. The reversal of 12644433875608 is 80657833444621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2492985216 + ... + 2492990287.

It is an arithmetic number, because the mean of its divisors is an integer number (1486443947130).

Almost surely, 2^{12644433875608} is an apocalyptic number.

It is an amenable number.

12644433875608 is a deficient number, since it is larger than the sum of its proper divisors (11138669278472).

12644433875608 is a wasteful number, since it uses less digits than its factorization.

12644433875608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4985975826 (or 4985975822 counting only the distinct ones).

The product of its (nonzero) digits is 92897280, while the sum is 61.

The spelling of 12644433875608 in words is "twelve trillion, six hundred forty-four billion, four hundred thirty-three million, eight hundred seventy-five thousand, six hundred eight".