12644503606 has 32 divisors (see below), whose sum is σ = 22314542400. Its totient is φ = 5371083648.

The previous prime is 12644503601. The next prime is 12644503633. The reversal of 12644503606 is 60630544621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644503601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4041 + ... + 159076.

It is an arithmetic number, because the mean of its divisors is an integer number (697329450).

Almost surely, 2^12644503606 is an apocalyptic number.

12644503606 is a deficient number, since it is larger than the sum of its proper divisors (9670038794).

12644503606 is a wasteful number, since it uses less digits than its factorization.

12644503606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163253 (or 163239 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 12644503606 in words is "twelve billion, six hundred forty-four million, five hundred three thousand, six hundred six".