565616 has 40 divisors (see below), whose sum is σ = 1205280. Its totient is φ = 256256.

The previous prime is 565613. The next prime is 565637. The reversal of 565616 is 616565.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10646 + ... + 10698.

It is an arithmetic number, because the mean of its divisors is an integer number (30132).

2⁵⁶⁵⁶¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602640).

565616 is an abundant number, since it is smaller than the sum of its proper divisors (639664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565616 is a wasteful number, since it uses less digits than its factorization.

565616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 107 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 565616 is about 752.0744643983. The cubic root of 565616 is about 82.7003273719.

The spelling of 565616 in words is "five hundred sixty-five thousand, six hundred sixteen".