12427542817 has 4 divisors (see below), whose sum is σ = 12436966080. Its totient is φ = 12418119556.

The previous prime is 12427542797. The next prime is 12427542833. The reversal of 12427542817 is 71824572421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12427542817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12427542887) 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, 4709653 + ... + 4712290.

It is an arithmetic number, because the mean of its divisors is an integer number (3109241520).

Almost surely, 2^12427542817 is an apocalyptic number.

It is an amenable number.

12427542817 is a deficient number, since it is larger than the sum of its proper divisors (9423263).

12427542817 is an equidigital number, since it uses as much as digits as its factorization.

12427542817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423262.

The product of its digits is 250880, while the sum is 43.

The spelling of 12427542817 in words is "twelve billion, four hundred twenty-seven million, five hundred forty-two thousand, eight hundred seventeen".