12444667889 has 8 divisors (see below), whose sum is σ = 12733578600. Its totient is φ = 12158496000.

The previous prime is 12444667877. The next prime is 12444667951. The reversal of 12444667889 is 98876644421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 84787264 + 12359880625 = 9208^2 + 111175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12444667889 - 2²⁰ = 12443619313 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12444667789) 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 7 ways as a sum of consecutive naturals, for example, 675512 + ... + 693689.

It is an arithmetic number, because the mean of its divisors is an integer number (1591697325).

Almost surely, 2^12444667889 is an apocalyptic number.

It is an amenable number.

12444667889 is a deficient number, since it is larger than the sum of its proper divisors (288910711).

12444667889 is a wasteful number, since it uses less digits than its factorization.

12444667889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369411.

The product of its digits is 18579456, while the sum is 59.

The spelling of 12444667889 in words is "twelve billion, four hundred forty-four million, six hundred sixty-seven thousand, eight hundred eighty-nine".