13565381361 has 32 divisors (see below), whose sum is σ = 21047486208. Its totient is φ = 7610941440.

The previous prime is 13565381351. The next prime is 13565381369. The reversal of 13565381361 is 16318356531.

13565381361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13565381361 - 2⁵ = 13565381329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13565381369) 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 in 31 ways as a sum of consecutive naturals, for example, 729961 + ... + 748313.

It is an arithmetic number, because the mean of its divisors is an integer number (657733944).

Almost surely, 2^13565381361 is an apocalyptic number.

It is an amenable number.

13565381361 is a deficient number, since it is larger than the sum of its proper divisors (7482104847).

13565381361 is a wasteful number, since it uses less digits than its factorization.

13565381361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19001.

The product of its digits is 194400, while the sum is 42.

The spelling of 13565381361 in words is "thirteen billion, five hundred sixty-five million, three hundred eighty-one thousand, three hundred sixty-one".