12545417867 has 2 divisors, whose sum is σ = 12545417868. Its totient is φ = 12545417866.

The previous prime is 12545417851. The next prime is 12545417887. The reversal of 12545417867 is 76871454521.

It is a weak prime.

It is an emirp because it is prime and its reverse (76871454521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12545417867 - 2⁴ = 12545417851 is a prime.

It is not a weakly prime, because it can be changed into another prime (12545417837) 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 as a sum of consecutive naturals, namely, 6272708933 + 6272708934.

It is an arithmetic number, because the mean of its divisors is an integer number (6272708934).

Almost surely, 2^12545417867 is an apocalyptic number.

12545417867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12545417867 is an equidigital number, since it uses as much as digits as its factorization.

12545417867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1881600, while the sum is 50.

The spelling of 12545417867 in words is "twelve billion, five hundred forty-five million, four hundred seventeen thousand, eight hundred sixty-seven".