12456562543 has 4 divisors (see below), whose sum is σ = 12746250088. Its totient is φ = 12166875000.

The previous prime is 12456562537. The next prime is 12456562577. The reversal of 12456562543 is 34526565421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34526565421 = 13327 ⋅2590723.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12456562543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 289687501 = 12456562543 / (1 + 2 + 4 + 5 + 6 + 5 + 6 + 2 + 5 + 4 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12456562543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12456562843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144843708 + ... + 144843793.

It is an arithmetic number, because the mean of its divisors is an integer number (3186562522).

Almost surely, 2^12456562543 is an apocalyptic number.

12456562543 is a deficient number, since it is larger than the sum of its proper divisors (289687545).

12456562543 is an equidigital number, since it uses as much as digits as its factorization.

12456562543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289687544.

The product of its digits is 864000, while the sum is 43.

The spelling of 12456562543 in words is "twelve billion, four hundred fifty-six million, five hundred sixty-two thousand, five hundred forty-three".