13635135161 has 4 divisors (see below), whose sum is σ = 13643115300. Its totient is φ = 13627155024.

The previous prime is 13635135127. The next prime is 13635135197. The reversal of 13635135161 is 16153153631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16153153631 = 2957 ⋅5462683.

It can be written as a sum of positive squares in 2 ways, for example, as 3643933225 + 9991201936 = 60365^2 + 99956^2 .

It is a cyclic number.

It is not a de Polignac number, because 13635135161 - 2⁶ = 13635135097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13635135121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3987506 + ... + 3990923.

It is an arithmetic number, because the mean of its divisors is an integer number (3410778825).

Almost surely, 2^13635135161 is an apocalyptic number.

It is an amenable number.

13635135161 is a deficient number, since it is larger than the sum of its proper divisors (7980139).

13635135161 is an equidigital number, since it uses as much as digits as its factorization.

13635135161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7980138.

The product of its digits is 24300, while the sum is 35.

Adding to 13635135161 its reverse (16153153631), we get a palindrome (29788288792).

The spelling of 13635135161 in words is "thirteen billion, six hundred thirty-five million, one hundred thirty-five thousand, one hundred sixty-one".