5645565 has 64 divisors (see below), whose sum is σ = 11059200. Its totient is φ = 2721600.

The previous prime is 5645551. The next prime is 5645569. The reversal of 5645565 is 5655465.

It is a happy number.

5645565 is a `hidden beast` number, since 5 + 645 + 5 + 6 + 5 = 666.

It is not a de Polignac number, because 5645565 - 2⁶ = 5645501 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645569) 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 63 ways as a sum of consecutive naturals, for example, 79480 + ... + 79550.

It is an arithmetic number, because the mean of its divisors is an integer number (172800).

Almost surely, 2^5645565 is an apocalyptic number.

It is an amenable number.

5645565 is a deficient number, since it is larger than the sum of its proper divisors (5413635).

5645565 is a wasteful number, since it uses less digits than its factorization.

5645565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 129 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 5645565 is about 2376.0397723944. The cubic root of 5645565 is about 178.0611349993.

The spelling of 5645565 in words is "five million, six hundred forty-five thousand, five hundred sixty-five".