13126345549 has 2 divisors, whose sum is σ = 13126345550. Its totient is φ = 13126345548.

The previous prime is 13126345543. The next prime is 13126345577. The reversal of 13126345549 is 94554362131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10227276900 + 2899068649 = 101130^2 + 53843^2 .

It is a cyclic number.

It is not a de Polignac number, because 13126345549 - 2¹⁵ = 13126312781 is a prime.

It is a super-2 number, since 2×13126345549² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13126345543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6563172774 + 6563172775.

It is an arithmetic number, because the mean of its divisors is an integer number (6563172775).

Almost surely, 2^13126345549 is an apocalyptic number.

It is an amenable number.

13126345549 is a deficient number, since it is larger than the sum of its proper divisors (1).

13126345549 is an equidigital number, since it uses as much as digits as its factorization.

13126345549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The spelling of 13126345549 in words is "thirteen billion, one hundred twenty-six million, three hundred forty-five thousand, five hundred forty-nine".