659643580499 has 2 divisors, whose sum is σ = 659643580500. Its totient is φ = 659643580498.

The previous prime is 659643580357. The next prime is 659643580501. The reversal of 659643580499 is 994085346956.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 659643580499 - 2⁸ = 659643580243 is a prime.

Together with 659643580501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (659643580699) 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, 329821790249 + 329821790250.

It is an arithmetic number, because the mean of its divisors is an integer number (329821790250).

Almost surely, 2^659643580499 is an apocalyptic number.

659643580499 is a deficient number, since it is larger than the sum of its proper divisors (1).

659643580499 is an equidigital number, since it uses as much as digits as its factorization.

659643580499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 251942400, while the sum is 68.

It can be divided in two parts, 65964 and 3580499, that added together give a palindrome (3646463).

The spelling of 659643580499 in words is "six hundred fifty-nine billion, six hundred forty-three million, five hundred eighty thousand, four hundred ninety-nine".