12446224536 has 128 divisors (see below), whose sum is σ = 32245678080. Its totient is φ = 4001187456.

The previous prime is 12446224523. The next prime is 12446224537. The reversal of 12446224536 is 63542264421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12446224494 and 12446224503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12446224537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40541295 + ... + 40541601.

It is an arithmetic number, because the mean of its divisors is an integer number (251919360).

Almost surely, 2^12446224536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12446224536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16122839040).

12446224536 is an abundant number, since it is smaller than the sum of its proper divisors (19799453544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12446224536 is a wasteful number, since it uses less digits than its factorization.

12446224536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 769 counting only the distinct ones).

The product of its digits is 276480, while the sum is 39.

Adding to 12446224536 its reverse (63542264421), we get a palindrome (75988488957).

The spelling of 12446224536 in words is "twelve billion, four hundred forty-six million, two hundred twenty-four thousand, five hundred thirty-six".