12644444266 has 8 divisors (see below), whose sum is σ = 19195180704. Its totient is φ = 6246050700.

The previous prime is 12644444257. The next prime is 12644444333. The reversal of 12644444266 is 66244444621.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 38085510 + ... + 38085841.

It is an arithmetic number, because the mean of its divisors is an integer number (2399397588).

Almost surely, 2^12644444266 is an apocalyptic number.

12644444266 is a deficient number, since it is larger than the sum of its proper divisors (6550736438).

12644444266 is an equidigital number, since it uses as much as digits as its factorization.

12644444266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76171436.

The product of its digits is 884736, while the sum is 43.

Adding to 12644444266 its reverse (66244444621), we get a palindrome (78888888887).

The spelling of 12644444266 in words is "twelve billion, six hundred forty-four million, four hundred forty-four thousand, two hundred sixty-six".