13616559449 has 2 divisors, whose sum is σ = 13616559450. Its totient is φ = 13616559448.

The previous prime is 13616559431. The next prime is 13616559461. The reversal of 13616559449 is 94495561631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13125139225 + 491420224 = 114565^2 + 22168^2 .

It is an emirp because it is prime and its reverse (94495561631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13616559449 - 2⁸ = 13616559193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13616559449.

It is not a weakly prime, because it can be changed into another prime (13612559449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6808279724 + 6808279725.

It is an arithmetic number, because the mean of its divisors is an integer number (6808279725).

Almost surely, 2^13616559449 is an apocalyptic number.

It is an amenable number.

13616559449 is a deficient number, since it is larger than the sum of its proper divisors (1).

13616559449 is an equidigital number, since it uses as much as digits as its factorization.

13616559449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 53.

The spelling of 13616559449 in words is "thirteen billion, six hundred sixteen million, five hundred fifty-nine thousand, four hundred forty-nine".