12642565226 has 16 divisors (see below), whose sum is σ = 19199317896. Its totient is φ = 6243261696.

The previous prime is 12642565223. The next prime is 12642565237. The reversal of 12642565226 is 62256524621.

It can be written as a sum of positive squares in 4 ways, for example, as 12473539225 + 169026001 = 111685^2 + 13001^2 .

It is not an unprimeable number, because it can be changed into a prime (12642565223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63131 + ... + 171086.

Almost surely, 2^12642565226 is an apocalyptic number.

12642565226 is a deficient number, since it is larger than the sum of its proper divisors (6556752670).

12642565226 is a wasteful number, since it uses less digits than its factorization.

12642565226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234553.

The product of its digits is 345600, while the sum is 41.

The spelling of 12642565226 in words is "twelve billion, six hundred forty-two million, five hundred sixty-five thousand, two hundred twenty-six".