5661565 has 32 divisors (see below), whose sum is σ = 8741376. Its totient is φ = 3421440.

The previous prime is 5661559. The next prime is 5661587. The reversal of 5661565 is 5651665.

It is not a de Polignac number, because 5661565 - 2¹⁵ = 5628797 is a prime.

5661565 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5661565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10195 + ... + 10735.

It is an arithmetic number, because the mean of its divisors is an integer number (273168).

Almost surely, 2^5661565 is an apocalyptic number.

It is an amenable number.

5661565 is a deficient number, since it is larger than the sum of its proper divisors (3079811).

5661565 is a wasteful number, since it uses less digits than its factorization.

5661565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589.

The product of its digits is 27000, while the sum is 34.

The square root of 5661565 is about 2379.4043372239. The cubic root of 5661565 is about 178.2291896862.

It can be divided in two parts, 5661 and 565, that added together give a palindrome (6226).

The spelling of 5661565 in words is "five million, six hundred sixty-one thousand, five hundred sixty-five".