13123485849517 has 2 divisors, whose sum is σ = 13123485849518. Its totient is φ = 13123485849516.

The previous prime is 13123485849503. The next prime is 13123485849563. The reversal of 13123485849517 is 71594858432131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12368578576201 + 754907273316 = 3516899^2 + 868854^2 .

It is an emirp because it is prime and its reverse (71594858432131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13123485849517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13123485849217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561742924758 + 6561742924759.

It is an arithmetic number, because the mean of its divisors is an integer number (6561742924759).

Almost surely, 2^{13123485849517} is an apocalyptic number.

It is an amenable number.

13123485849517 is a deficient number, since it is larger than the sum of its proper divisors (1).

13123485849517 is an equidigital number, since it uses as much as digits as its factorization.

13123485849517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 61.

The spelling of 13123485849517 in words is "thirteen trillion, one hundred twenty-three billion, four hundred eighty-five million, eight hundred forty-nine thousand, five hundred seventeen".