12444467889 has 16 divisors (see below), whose sum is σ = 18975781760. Its totient is φ = 7106330880.

The previous prime is 12444467881. The next prime is 12444467897. The reversal of 12444467889 is 98876444421.

It is an interprime number because it is at equal distance from previous prime (12444467881) and next prime (12444467897).

It is not a de Polignac number, because 12444467889 - 2³ = 12444467881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12444467881) 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 15 ways as a sum of consecutive naturals, for example, 167722 + ... + 230259.

It is an arithmetic number, because the mean of its divisors is an integer number (1185986360).

Almost surely, 2^12444467889 is an apocalyptic number.

It is an amenable number.

12444467889 is a deficient number, since it is larger than the sum of its proper divisors (6531313871).

12444467889 is a wasteful number, since it uses less digits than its factorization.

12444467889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399480.

The product of its digits is 12386304, while the sum is 57.

The spelling of 12444467889 in words is "twelve billion, four hundred forty-four million, four hundred sixty-seven thousand, eight hundred eighty-nine".