218493859547 has 2 divisors, whose sum is σ = 218493859548. Its totient is φ = 218493859546.

The previous prime is 218493859481. The next prime is 218493859601. The reversal of 218493859547 is 745958394812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218493859547 - 2¹⁴ = 218493843163 is a prime.

It is not a weakly prime, because it can be changed into another prime (218493852547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109246929773 + 109246929774.

It is an arithmetic number, because the mean of its divisors is an integer number (109246929774).

Almost surely, 2^218493859547 is an apocalyptic number.

218493859547 is a deficient number, since it is larger than the sum of its proper divisors (1).

218493859547 is an equidigital number, since it uses as much as digits as its factorization.

218493859547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87091200, while the sum is 65.

The spelling of 218493859547 in words is "two hundred eighteen billion, four hundred ninety-three million, eight hundred fifty-nine thousand, five hundred forty-seven".