5656568656565 has 4 divisors (see below), whose sum is σ = 6787882387884. Its totient is φ = 4525254925248.

The previous prime is 5656568656549. The next prime is 5656568656573.

5656568656565 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3213418345201 + 2443150311364 = 1792601^2 + 1563058^2 .

It is a cyclic number.

It is not a de Polignac number, because 5656568656565 - 2⁴ = 5656568656549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5656568656492 and 5656568656501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565656865652 + ... + 565656865661.

It is an arithmetic number, because the mean of its divisors is an integer number (1696970596971).

Almost surely, 2^{5656568656565} is an apocalyptic number.

It is an amenable number.

5656568656565 is a deficient number, since it is larger than the sum of its proper divisors (1131313731319).

5656568656565 is a wasteful number, since it uses less digits than its factorization.

5656568656565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131313731318.

The product of its digits is 5832000000, while the sum is 74.

The spelling of 5656568656565 in words is "five trillion, six hundred fifty-six billion, five hundred sixty-eight million, six hundred fifty-six thousand, five hundred sixty-five".