5656556565 has 64 divisors (see below), whose sum is σ = 10997683200. Its totient is φ = 2735726400.

The previous prime is 5656556537. The next prime is 5656556569.

5656556565 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5656556565 - 2¹² = 5656552469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5656556569) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 617670 + ... + 626760.

It is an arithmetic number, because the mean of its divisors is an integer number (171838800).

Almost surely, 2^5656556565 is an apocalyptic number.

5656556565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5656556565 is a deficient number, since it is larger than the sum of its proper divisors (5341126635).

5656556565 is a wasteful number, since it uses less digits than its factorization.

5656556565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9535 (or 9529 counting only the distinct ones).

The product of its digits is 20250000, while the sum is 54.

The square root of 5656556565 is about 75210.0828679240. The cubic root of 5656556565 is about 1781.7661808192.

The spelling of 5656556565 in words is "five billion, six hundred fifty-six million, five hundred fifty-six thousand, five hundred sixty-five".