12544332243 has 32 divisors (see below), whose sum is σ = 17333289792. Its totient is φ = 8064460800.

The previous prime is 12544332193. The next prime is 12544332271. The reversal of 12544332243 is 34223344521.

It is a de Polignac number, because none of the positive numbers 2^k-12544332243 is a prime.

It is a super-2 number, since 2×12544332243² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12544332443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3849871 + ... + 3853127.

It is an arithmetic number, because the mean of its divisors is an integer number (541665306).

Almost surely, 2^12544332243 is an apocalyptic number.

12544332243 is a deficient number, since it is larger than the sum of its proper divisors (4788957549).

12544332243 is a wasteful number, since it uses less digits than its factorization.

12544332243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3655.

The product of its digits is 69120, while the sum is 33.

Adding to 12544332243 its reverse (34223344521), we get a palindrome (46767676764).

The spelling of 12544332243 in words is "twelve billion, five hundred forty-four million, three hundred thirty-two thousand, two hundred forty-three".