13225161636 has 18 divisors (see below), whose sum is σ = 33430269782. Its totient is φ = 4408387200.

The previous prime is 13225161583. The next prime is 13225161659. The reversal of 13225161636 is 63616152231.

13225161636 is a `hidden beast` number, since 1 + 3 + 2 + 2 + 5 + 1 + 616 + 36 = 666.

13225161636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11988936036 + 1236225600 = 109494^2 + 35160^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 367365601 = 13225161636 / (1 + 3 + 2 + 2 + 5 + 1 + 6 + 1 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 13225161636.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 183682765 + ... + 183682836.

Almost surely, 2^13225161636 is an apocalyptic number.

It is an amenable number.

13225161636 is an abundant number, since it is smaller than the sum of its proper divisors (20205108146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13225161636 is a wasteful number, since it uses less digits than its factorization.

13225161636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367365611 (or 367365606 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 13225161636 in words is "thirteen billion, two hundred twenty-five million, one hundred sixty-one thousand, six hundred thirty-six".