12644559608 has 16 divisors (see below), whose sum is σ = 25103170080. Its totient is φ = 5950380928.

The previous prime is 12644559607. The next prime is 12644559617. The reversal of 12644559608 is 80695544621.

It is a super-2 number, since 2×12644559608² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644559607) 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 3 ways as a sum of consecutive naturals, for example, 46487216 + ... + 46487487.

It is an arithmetic number, because the mean of its divisors is an integer number (1568948130).

Almost surely, 2^12644559608 is an apocalyptic number.

It is an amenable number.

12644559608 is a deficient number, since it is larger than the sum of its proper divisors (12458610472).

12644559608 is a wasteful number, since it uses less digits than its factorization.

12644559608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92974726 (or 92974722 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 12644559608 in words is "twelve billion, six hundred forty-four million, five hundred fifty-nine thousand, six hundred eight".