12440455439 has 2 divisors, whose sum is σ = 12440455440. Its totient is φ = 12440455438.

The previous prime is 12440455411. The next prime is 12440455541. The reversal of 12440455439 is 93455404421.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12440455439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12440455396 and 12440455405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440455039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220227719 + 6220227720.

It is an arithmetic number, because the mean of its divisors is an integer number (6220227720).

Almost surely, 2^12440455439 is an apocalyptic number.

12440455439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440455439 is an equidigital number, since it uses as much as digits as its factorization.

12440455439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 12440455439 in words is "twelve billion, four hundred forty million, four hundred fifty-five thousand, four hundred thirty-nine".