12541343449 has 2 divisors, whose sum is σ = 12541343450. Its totient is φ = 12541343448.

The previous prime is 12541343447. The next prime is 12541343459. The reversal of 12541343449 is 94434314521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10413182025 + 2128161424 = 102045^2 + 46132^2 .

It is a cyclic number.

It is not a de Polignac number, because 12541343449 - 2¹ = 12541343447 is a prime.

Together with 12541343447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12541343447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6270671724 + 6270671725.

It is an arithmetic number, because the mean of its divisors is an integer number (6270671725).

Almost surely, 2^12541343449 is an apocalyptic number.

It is an amenable number.

12541343449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12541343449 is an equidigital number, since it uses as much as digits as its factorization.

12541343449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The spelling of 12541343449 in words is "twelve billion, five hundred forty-one million, three hundred forty-three thousand, four hundred forty-nine".