13617439261 has 2 divisors, whose sum is σ = 13617439262. Its totient is φ = 13617439260.

The previous prime is 13617439243. The next prime is 13617439273. The reversal of 13617439261 is 16293471631.

13617439261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7570044036 + 6047395225 = 87006^2 + 77765^2 .

It is an emirp because it is prime and its reverse (16293471631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13617439261 - 2¹¹ = 13617437213 is a prime.

It is a super-2 number, since 2×13617439261² (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 (13617439291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6808719630 + 6808719631.

It is an arithmetic number, because the mean of its divisors is an integer number (6808719631).

Almost surely, 2^13617439261 is an apocalyptic number.

It is an amenable number.

13617439261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13617439261 is an equidigital number, since it uses as much as digits as its factorization.

13617439261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The spelling of 13617439261 in words is "thirteen billion, six hundred seventeen million, four hundred thirty-nine thousand, two hundred sixty-one".