217552660579 has 2 divisors, whose sum is σ = 217552660580. Its totient is φ = 217552660578.

The previous prime is 217552660553. The next prime is 217552660603. The reversal of 217552660579 is 975066255712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217552660579 - 2⁹ = 217552660067 is a prime.

It is not a weakly prime, because it can be changed into another prime (217552660279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108776330289 + 108776330290.

It is an arithmetic number, because the mean of its divisors is an integer number (108776330290).

Almost surely, 2^217552660579 is an apocalyptic number.

217552660579 is a deficient number, since it is larger than the sum of its proper divisors (1).

217552660579 is an equidigital number, since it uses as much as digits as its factorization.

217552660579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938000, while the sum is 55.

The spelling of 217552660579 in words is "two hundred seventeen billion, five hundred fifty-two million, six hundred sixty thousand, five hundred seventy-nine".