12543299234 has 4 divisors (see below), whose sum is σ = 18814948854. Its totient is φ = 6271649616.

The previous prime is 12543299233. The next prime is 12543299243. The reversal of 12543299234 is 43299234521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43299234521 = 23623 ⋅1832927.

It can be written as a sum of positive squares in only one way, i.e., 12511093609 + 32205625 = 111853^2 + 5675^2 .

It is not an unprimeable number, because it can be changed into a prime (12543299233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135824807 + ... + 3135824810.

Almost surely, 2^12543299234 is an apocalyptic number.

12543299234 is a deficient number, since it is larger than the sum of its proper divisors (6271649620).

12543299234 is an equidigital number, since it uses as much as digits as its factorization.

12543299234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271649619.

The product of its digits is 466560, while the sum is 44.

The spelling of 12543299234 in words is "twelve billion, five hundred forty-three million, two hundred ninety-nine thousand, two hundred thirty-four".