12644245423 has 4 divisors (see below), whose sum is σ = 13193995248. Its totient is φ = 12094495600.

The previous prime is 12644245421. The next prime is 12644245429. The reversal of 12644245423 is 32454244621.

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 12644245423 - 2¹ = 12644245421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12644245421) 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, 274874878 + ... + 274874923.

It is an arithmetic number, because the mean of its divisors is an integer number (3298498812).

Almost surely, 2^12644245423 is an apocalyptic number.

12644245423 is a deficient number, since it is larger than the sum of its proper divisors (549749825).

12644245423 is an equidigital number, since it uses as much as digits as its factorization.

12644245423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549749824.

The product of its digits is 184320, while the sum is 37.

The spelling of 12644245423 in words is "twelve billion, six hundred forty-four million, two hundred forty-five thousand, four hundred twenty-three".