12644445602323 has 4 divisors (see below), whose sum is σ = 12644671101840. Its totient is φ = 12644220102808.

The previous prime is 12644445602317. The next prime is 12644445602333. The reversal of 12644445602323 is 32320654444621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12644445602323 - 2²¹ = 12644443505171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12644445602333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112665628 + ... + 112777801.

It is an arithmetic number, because the mean of its divisors is an integer number (3161167775460).

Almost surely, 2^{12644445602323} is an apocalyptic number.

12644445602323 is a deficient number, since it is larger than the sum of its proper divisors (225499517).

12644445602323 is an equidigital number, since it uses as much as digits as its factorization.

12644445602323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225499516.

The product of its (nonzero) digits is 3317760, while the sum is 46.

The spelling of 12644445602323 in words is "twelve trillion, six hundred forty-four billion, four hundred forty-five million, six hundred two thousand, three hundred twenty-three".