13204884561 has 16 divisors (see below), whose sum is σ = 19227561408. Its totient is φ = 7994436800.

The previous prime is 13204884559. The next prime is 13204884569. The reversal of 13204884561 is 16548840231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13204884561 - 2¹ = 13204884559 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13204884569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181566 + ... + 243671.

It is an arithmetic number, because the mean of its divisors is an integer number (1201722588).

Almost surely, 2^13204884561 is an apocalyptic number.

13204884561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13204884561 is a deficient number, since it is larger than the sum of its proper divisors (6022676847).

13204884561 is a wasteful number, since it uses less digits than its factorization.

13204884561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426192.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 13204884561 in words is "thirteen billion, two hundred four million, eight hundred eighty-four thousand, five hundred sixty-one".