12440323073 has 2 divisors, whose sum is σ = 12440323074. Its totient is φ = 12440323072.

The previous prime is 12440323067. The next prime is 12440323097. The reversal of 12440323073 is 37032304421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12145582849 + 294740224 = 110207^2 + 17168^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440323073 - 2⁴ = 12440323057 is a prime.

It is not a weakly prime, because it can be changed into another prime (12440323573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220161536 + 6220161537.

It is an arithmetic number, because the mean of its divisors is an integer number (6220161537).

Almost surely, 2^12440323073 is an apocalyptic number.

It is an amenable number.

12440323073 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440323073 is an equidigital number, since it uses as much as digits as its factorization.

12440323073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 29.

Adding to 12440323073 its reverse (37032304421), we get a palindrome (49472627494).

The spelling of 12440323073 in words is "twelve billion, four hundred forty million, three hundred twenty-three thousand, seventy-three".