123544444613 has 2 divisors, whose sum is σ = 123544444614. Its totient is φ = 123544444612.

The previous prime is 123544444609. The next prime is 123544444651. The reversal of 123544444613 is 316444445321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89636168449 + 33908276164 = 299393^2 + 184142^2 .

It is a cyclic number.

It is not a de Polignac number, because 123544444613 - 2² = 123544444609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123544444213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61772222306 + 61772222307.

It is an arithmetic number, because the mean of its divisors is an integer number (61772222307).

Almost surely, 2^123544444613 is an apocalyptic number.

It is an amenable number.

123544444613 is a deficient number, since it is larger than the sum of its proper divisors (1).

123544444613 is an equidigital number, since it uses as much as digits as its factorization.

123544444613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 41.

Adding to 123544444613 its reverse (316444445321), we get a palindrome (439988889934).

The spelling of 123544444613 in words is "one hundred twenty-three billion, five hundred forty-four million, four hundred forty-four thousand, six hundred thirteen".