12563444266 has 16 divisors (see below), whose sum is σ = 19114592256. Its totient is φ = 6192544176.

The previous prime is 12563444263. The next prime is 12563444273. The reversal of 12563444266 is 66244436521.

It is not an unprimeable number, because it can be changed into a prime (12563444263) 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 7 ways as a sum of consecutive naturals, for example, 117646 + ... + 197401.

It is an arithmetic number, because the mean of its divisors is an integer number (1194662016).

Almost surely, 2^12563444266 is an apocalyptic number.

12563444266 is a deficient number, since it is larger than the sum of its proper divisors (6551147990).

12563444266 is a wasteful number, since it uses less digits than its factorization.

12563444266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315333.

The product of its digits is 829440, while the sum is 43.

The spelling of 12563444266 in words is "twelve billion, five hundred sixty-three million, four hundred forty-four thousand, two hundred sixty-six".