12643227243 has 12 divisors (see below), whose sum is σ = 18265557648. Its totient is φ = 8427378960.

The previous prime is 12643227241. The next prime is 12643227257. The reversal of 12643227243 is 34272234621.

12643227243 is a `hidden beast` number, since 1 + 2 + 643 + 2 + 2 + 7 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 12643227243 - 2¹ = 12643227241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12643227198 and 12643227207.

It is not an unprimeable number, because it can be changed into a prime (12643227241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62868 + ... + 170993.

It is an arithmetic number, because the mean of its divisors is an integer number (1522129804).

Almost surely, 2^12643227243 is an apocalyptic number.

12643227243 is a deficient number, since it is larger than the sum of its proper divisors (5622330405).

12643227243 is a wasteful number, since it uses less digits than its factorization.

12643227243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239874 (or 239871 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The spelling of 12643227243 in words is "twelve billion, six hundred forty-three million, two hundred twenty-seven thousand, two hundred forty-three".