13161563611 has 12 divisors (see below), whose sum is σ = 15461984160. Its totient is φ = 11169639600.

The previous prime is 13161563599. The next prime is 13161563629. The reversal of 13161563611 is 11636516131.

It is not a de Polignac number, because 13161563611 - 2⁵ = 13161563579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13161563651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1324771 + ... + 1334668.

It is an arithmetic number, because the mean of its divisors is an integer number (1288498680).

Almost surely, 2^13161563611 is an apocalyptic number.

13161563611 is a deficient number, since it is larger than the sum of its proper divisors (2300420549).

13161563611 is a wasteful number, since it uses less digits than its factorization.

13161563611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659554 (or 2659547 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The spelling of 13161563611 in words is "thirteen billion, one hundred sixty-one million, five hundred sixty-three thousand, six hundred eleven".