5656561565 has 8 divisors (see below), whose sum is σ = 6790322688. Its totient is φ = 4523616720.

The previous prime is 5656561541. The next prime is 5656561607. The reversal of 5656561565 is 5651656565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5656561565 - 2¹⁰ = 5656560541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188717 + ... + 216626.

It is an arithmetic number, because the mean of its divisors is an integer number (848790336).

Almost surely, 2^5656561565 is an apocalyptic number.

It is an amenable number.

5656561565 is a deficient number, since it is larger than the sum of its proper divisors (1133761123).

5656561565 is a wasteful number, since it uses less digits than its factorization.

5656561565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408139.

The product of its digits is 4050000, while the sum is 50.

The square root of 5656561565 is about 75210.1161081407. The cubic root of 5656561565 is about 1781.7667058046.

The spelling of 5656561565 in words is "five billion, six hundred fifty-six million, five hundred sixty-one thousand, five hundred sixty-five".