12543242567 has 2 divisors, whose sum is σ = 12543242568. Its totient is φ = 12543242566.

The previous prime is 12543242561. The next prime is 12543242639. The reversal of 12543242567 is 76524234521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12543242567 - 2¹⁴ = 12543226183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12543242561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6271621283 + 6271621284.

It is an arithmetic number, because the mean of its divisors is an integer number (6271621284).

Almost surely, 2^12543242567 is an apocalyptic number.

12543242567 is a deficient number, since it is larger than the sum of its proper divisors (1).

12543242567 is an equidigital number, since it uses as much as digits as its factorization.

12543242567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 41.

The spelling of 12543242567 in words is "twelve billion, five hundred forty-three million, two hundred forty-two thousand, five hundred sixty-seven".