5656356217 has 2 divisors, whose sum is σ = 5656356218. Its totient is φ = 5656356216.

The previous prime is 5656356203. The next prime is 5656356239. The reversal of 5656356217 is 7126536565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3578910976 + 2077445241 = 59824^2 + 45579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5656356217 is a prime.

It is not a weakly prime, because it can be changed into another prime (5656356257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828178108 + 2828178109.

It is an arithmetic number, because the mean of its divisors is an integer number (2828178109).

Almost surely, 2^5656356217 is an apocalyptic number.

It is an amenable number.

5656356217 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656356217 is an equidigital number, since it uses as much as digits as its factorization.

5656356217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 46.

The square root of 5656356217 is about 75208.7509336513. The cubic root of 5656356217 is about 1781.7451446110.

The spelling of 5656356217 in words is "five billion, six hundred fifty-six million, three hundred fifty-six thousand, two hundred seventeen".