13365600561 has 32 divisors (see below), whose sum is σ = 19962512640. Its totient is φ = 8837856000.

The previous prime is 13365600551. The next prime is 13365600569. The reversal of 13365600561 is 16500656331.

13365600561 is a `hidden beast` number, since 1 + 3 + 36 + 5 + 60 + 0 + 561 = 666.

It is not a de Polignac number, because 13365600561 - 2¹⁰ = 13365599537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13365600569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3149401 + ... + 3153641.

It is an arithmetic number, because the mean of its divisors is an integer number (623828520).

Almost surely, 2^13365600561 is an apocalyptic number.

It is an amenable number.

13365600561 is a deficient number, since it is larger than the sum of its proper divisors (6596912079).

13365600561 is a wasteful number, since it uses less digits than its factorization.

13365600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174 (or 5168 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The spelling of 13365600561 in words is "thirteen billion, three hundred sixty-five million, six hundred thousand, five hundred sixty-one".