12445444543541 has 2 divisors, whose sum is σ = 12445444543542. Its totient is φ = 12445444543540.

The previous prime is 12445444543421. The next prime is 12445444543547. The reversal of 12445444543541 is 14534544454421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11026317948100 + 1419126595441 = 3320590^2 + 1191271^2 .

It is an emirp because it is prime and its reverse (14534544454421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12445444543541 - 2³⁸ = 12170566636597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12445444543541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12445444543547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6222722271770 + 6222722271771.

It is an arithmetic number, because the mean of its divisors is an integer number (6222722271771).

Almost surely, 2^{12445444543541} is an apocalyptic number.

It is an amenable number.

12445444543541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12445444543541 is an equidigital number, since it uses as much as digits as its factorization.

12445444543541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288000, while the sum is 50.

Adding to 12445444543541 its reverse (14534544454421), we get a palindrome (26979988997962).

The spelling of 12445444543541 in words is "twelve trillion, four hundred forty-five billion, four hundred forty-four million, five hundred forty-three thousand, five hundred forty-one".