5656776565 has 16 divisors (see below), whose sum is σ = 7421331456. Its totient is φ = 4105076800.

The previous prime is 5656776551. The next prime is 5656776611.

5656776565 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5656776565 - 2⁹ = 5656776053 is a prime.

It is a super-2 number, since 2×5656776565² = 63998242212666398450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86197 + ... + 136906.

It is an arithmetic number, because the mean of its divisors is an integer number (463833216).

Almost surely, 2^5656776565 is an apocalyptic number.

5656776565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5656776565 is a deficient number, since it is larger than the sum of its proper divisors (1764554891).

5656776565 is a wasteful number, since it uses less digits than its factorization.

5656776565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223580.

The product of its digits is 39690000, while the sum is 58.

The square root of 5656776565 is about 75211.5454235585. The cubic root of 5656776565 is about 1781.7892798827.

The spelling of 5656776565 in words is "five billion, six hundred fifty-six million, seven hundred seventy-six thousand, five hundred sixty-five".