218564372111 has 2 divisors, whose sum is σ = 218564372112. Its totient is φ = 218564372110.

The previous prime is 218564372093. The next prime is 218564372129. The reversal of 218564372111 is 111273465812.

It is a balanced prime because it is at equal distance from previous prime (218564372093) and next prime (218564372129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218564372111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218564375111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109282186055 + 109282186056.

It is an arithmetic number, because the mean of its divisors is an integer number (109282186056).

Almost surely, 2^218564372111 is an apocalyptic number.

218564372111 is a deficient number, since it is larger than the sum of its proper divisors (1).

218564372111 is an equidigital number, since it uses as much as digits as its factorization.

218564372111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 41.

The spelling of 218564372111 in words is "two hundred eighteen billion, five hundred sixty-four million, three hundred seventy-two thousand, one hundred eleven".