218493859601 has 2 divisors, whose sum is σ = 218493859602. Its totient is φ = 218493859600.

The previous prime is 218493859547. The next prime is 218493859657. The reversal of 218493859601 is 106958394812.

It is an a-pointer prime, because the next prime (218493859657) can be obtained adding 218493859601 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203640100225 + 14853759376 = 451265^2 + 121876^2 .

It is a cyclic number.

It is not a de Polignac number, because 218493859601 - 2²² = 218489665297 is a prime.

It is not a weakly prime, because it can be changed into another prime (218493859681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109246929800 + 109246929801.

It is an arithmetic number, because the mean of its divisors is an integer number (109246929801).

Almost surely, 2^218493859601 is an apocalyptic number.

It is an amenable number.

218493859601 is a deficient number, since it is larger than the sum of its proper divisors (1).

218493859601 is an equidigital number, since it uses as much as digits as its factorization.

218493859601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 218493859601 in words is "two hundred eighteen billion, four hundred ninety-three million, eight hundred fifty-nine thousand, six hundred one".