12451424449 has 2 divisors, whose sum is σ = 12451424450. Its totient is φ = 12451424448.

The previous prime is 12451424407. The next prime is 12451424459. The reversal of 12451424449 is 94442415421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12350321424 + 101103025 = 111132^2 + 10055^2 .

It is an emirp because it is prime and its reverse (94442415421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12451424449 - 2⁹ = 12451423937 is a prime.

It is not a weakly prime, because it can be changed into another prime (12451424459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6225712224 + 6225712225.

It is an arithmetic number, because the mean of its divisors is an integer number (6225712225).

Almost surely, 2^12451424449 is an apocalyptic number.

It is an amenable number.

12451424449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12451424449 is an equidigital number, since it uses as much as digits as its factorization.

12451424449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 40.

The spelling of 12451424449 in words is "twelve billion, four hundred fifty-one million, four hundred twenty-four thousand, four hundred forty-nine".