13653565 has 4 divisors (see below), whose sum is σ = 16384284. Its totient is φ = 10922848.

The previous prime is 13653539. The next prime is 13653587. The reversal of 13653565 is 56535631.

13653565 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56535631 = 257 ⋅219983.

It can be written as a sum of positive squares in 2 ways, for example, as 7513081 + 6140484 = 2741^2 + 2478^2 .

It is a cyclic number.

It is not a de Polignac number, because 13653565 - 2¹⁵ = 13620797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13653565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1365352 + ... + 1365361.

It is an arithmetic number, because the mean of its divisors is an integer number (4096071).

Almost surely, 2^13653565 is an apocalyptic number.

It is an amenable number.

13653565 is a deficient number, since it is larger than the sum of its proper divisors (2730719).

13653565 is an equidigital number, since it uses as much as digits as its factorization.

13653565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730718.

The product of its digits is 40500, while the sum is 34.

The square root of 13653565 is about 3695.0730709960. The cubic root of 13653565 is about 239.0096049547.

The spelling of 13653565 in words is "thirteen million, six hundred fifty-three thousand, five hundred sixty-five".