13653645 has 16 divisors (see below), whose sum is σ = 21935232. Its totient is φ = 7252160.

The previous prime is 13653637. The next prime is 13653659. The reversal of 13653645 is 54635631.

It is not a de Polignac number, because 13653645 - 2³ = 13653637 is a prime.

It is a super-3 number, since 3×13653645³ (a number of 22 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2215 + ... + 5675.

It is an arithmetic number, because the mean of its divisors is an integer number (1370952).

Almost surely, 2^13653645 is an apocalyptic number.

13653645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13653645 is a deficient number, since it is larger than the sum of its proper divisors (8281587).

13653645 is a wasteful number, since it uses less digits than its factorization.

13653645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732.

The product of its digits is 32400, while the sum is 33.

The square root of 13653645 is about 3695.0838962059. The cubic root of 13653645 is about 239.0100717615.

The spelling of 13653645 in words is "thirteen million, six hundred fifty-three thousand, six hundred forty-five".