5645722217 has 2 divisors, whose sum is σ = 5645722218. Its totient is φ = 5645722216.

The previous prime is 5645722207. The next prime is 5645722241. The reversal of 5645722217 is 7122275465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5642413456 + 3308761 = 75116^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645722217 - 2²⁰ = 5644673641 is a prime.

It is not a weakly prime, because it can be changed into another prime (5645722207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822861108 + 2822861109.

It is an arithmetic number, because the mean of its divisors is an integer number (2822861109).

Almost surely, 2^5645722217 is an apocalyptic number.

It is an amenable number.

5645722217 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645722217 is an equidigital number, since it uses as much as digits as its factorization.

5645722217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 41.

The square root of 5645722217 is about 75138.0211144797. The cubic root of 5645722217 is about 1780.6278785882.

The spelling of 5645722217 in words is "five billion, six hundred forty-five million, seven hundred twenty-two thousand, two hundred seventeen".