218436105911 has 2 divisors, whose sum is σ = 218436105912. Its totient is φ = 218436105910.

The previous prime is 218436105751. The next prime is 218436105959. The reversal of 218436105911 is 119501634812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218436105911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218436105971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109218052955 + 109218052956.

It is an arithmetic number, because the mean of its divisors is an integer number (109218052956).

Almost surely, 2^218436105911 is an apocalyptic number.

218436105911 is a deficient number, since it is larger than the sum of its proper divisors (1).

218436105911 is an equidigital number, since it uses as much as digits as its factorization.

218436105911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 218436105911 in words is "two hundred eighteen billion, four hundred thirty-six million, one hundred five thousand, nine hundred eleven".