13161504636 has 72 divisors (see below), whose sum is σ = 39675277824. Its totient is φ = 3596931360.

The previous prime is 13161504619. The next prime is 13161504637. The reversal of 13161504636 is 63640516131.

13161504636 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 15 + 0 + 4 + 636 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 13161504636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161504637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1129600 + ... + 1141191.

Almost surely, 2^13161504636 is an apocalyptic number.

It is an amenable number.

13161504636 is an abundant number, since it is smaller than the sum of its proper divisors (26513773188).

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

13161504636 is a wasteful number, since it uses less digits than its factorization.

13161504636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270831 (or 2270826 counting only the distinct ones).

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

The spelling of 13161504636 in words is "thirteen billion, one hundred sixty-one million, five hundred four thousand, six hundred thirty-six".