12522159449 has 2 divisors, whose sum is σ = 12522159450. Its totient is φ = 12522159448.

The previous prime is 12522159341. The next prime is 12522159457. The reversal of 12522159449 is 94495122521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10153585225 + 2368574224 = 100765^2 + 48668^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12522159449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12522159649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6261079724 + 6261079725.

It is an arithmetic number, because the mean of its divisors is an integer number (6261079725).

Almost surely, 2^12522159449 is an apocalyptic number.

It is an amenable number.

12522159449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12522159449 is an equidigital number, since it uses as much as digits as its factorization.

12522159449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The spelling of 12522159449 in words is "twelve billion, five hundred twenty-two million, one hundred fifty-nine thousand, four hundred forty-nine".