13655643 has 16 divisors (see below), whose sum is σ = 18784512. Its totient is φ = 8820000.

The previous prime is 13655633. The next prime is 13655647. The reversal of 13655643 is 34655631.

It is not a de Polignac number, because 13655643 - 2⁵ = 13655611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13655647) 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, 12468 + ... + 13518.

It is an arithmetic number, because the mean of its divisors is an integer number (1174032).

Almost surely, 2^13655643 is an apocalyptic number.

13655643 is a deficient number, since it is larger than the sum of its proper divisors (5128869).

13655643 is a wasteful number, since it uses less digits than its factorization.

13655643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186.

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

The square root of 13655643 is about 3695.3542455359. The cubic root of 13655643 is about 239.0217296700.

The spelling of 13655643 in words is "thirteen million, six hundred fifty-five thousand, six hundred forty-three".