12542422543 has 12 divisors (see below), whose sum is σ = 14615053992. Its totient is φ = 10732308720.

The previous prime is 12542422499. The next prime is 12542422553. The reversal of 12542422543 is 34522424521.

It is a de Polignac number, because none of the positive numbers 2^k-12542422543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12542422499 and 12542422508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12542422553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189268 + ... + 246793.

It is an arithmetic number, because the mean of its divisors is an integer number (1217921166).

Almost surely, 2^12542422543 is an apocalyptic number.

12542422543 is a deficient number, since it is larger than the sum of its proper divisors (2072631449).

12542422543 is an equidigital number, since it uses as much as digits as its factorization.

12542422543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436662 (or 436655 counting only the distinct ones).

The product of its digits is 76800, while the sum is 34.

The spelling of 12542422543 in words is "twelve billion, five hundred forty-two million, four hundred twenty-two thousand, five hundred forty-three".