12444242515 has 4 divisors (see below), whose sum is σ = 14933091024. Its totient is φ = 9955394008.

The previous prime is 12444242497. The next prime is 12444242557. The reversal of 12444242515 is 51524244421.

12444242515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12444242515 - 2¹⁵ = 12444209747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244424247 + ... + 1244424256.

It is an arithmetic number, because the mean of its divisors is an integer number (3733272756).

Almost surely, 2^12444242515 is an apocalyptic number.

12444242515 is a deficient number, since it is larger than the sum of its proper divisors (2488848509).

12444242515 is an equidigital number, since it uses as much as digits as its factorization.

12444242515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488848508.

The product of its digits is 51200, while the sum is 34.

Adding to 12444242515 its reverse (51524244421), we get a palindrome (63968486936).

The spelling of 12444242515 in words is "twelve billion, four hundred forty-four million, two hundred forty-two thousand, five hundred fifteen".