218416876241 has 2 divisors, whose sum is σ = 218416876242. Its totient is φ = 218416876240.

The previous prime is 218416876133. The next prime is 218416876253. The reversal of 218416876241 is 142678614812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211416040000 + 7000836241 = 459800^2 + 83671^2 .

It is a cyclic number.

It is not a de Polignac number, because 218416876241 - 2²² = 218412681937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218416876241.

It is not a weakly prime, because it can be changed into another prime (218416876841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109208438120 + 109208438121.

It is an arithmetic number, because the mean of its divisors is an integer number (109208438121).

Almost surely, 2^218416876241 is an apocalyptic number.

It is an amenable number.

218416876241 is a deficient number, since it is larger than the sum of its proper divisors (1).

218416876241 is an equidigital number, since it uses as much as digits as its factorization.

218416876241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1032192, while the sum is 50.

The spelling of 218416876241 in words is "two hundred eighteen billion, four hundred sixteen million, eight hundred seventy-six thousand, two hundred forty-one".