12444444447 has 16 divisors (see below), whose sum is σ = 16776664320. Its totient is φ = 8204481792.

The previous prime is 12444444437. The next prime is 12444444449. The reversal of 12444444447 is 74444444421.

It is a de Polignac number, because none of the positive numbers 2^k-12444444447 is a prime.

It is a plaindrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 12444444399 and 12444444408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444444449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201103 + ... + 255599.

It is an arithmetic number, because the mean of its divisors is an integer number (1048541520).

Almost surely, 2^12444444447 is an apocalyptic number.

12444444447 is a deficient number, since it is larger than the sum of its proper divisors (4332219873).

12444444447 is a wasteful number, since it uses less digits than its factorization.

12444444447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55342.

The product of its digits is 917504, while the sum is 42.

Adding to 12444444447 its reverse (74444444421), we get a palindrome (86888888868).

The spelling of 12444444447 in words is "twelve billion, four hundred forty-four million, four hundred forty-four thousand, four hundred forty-seven".