218594973811 has 2 divisors, whose sum is σ = 218594973812. Its totient is φ = 218594973810.

The previous prime is 218594973803. The next prime is 218594973899. The reversal of 218594973811 is 118379495812.

218594973811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218594973811 - 2³ = 218594973803 is a prime.

It is not a weakly prime, because it can be changed into another prime (218594976811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109297486905 + 109297486906.

It is an arithmetic number, because the mean of its divisors is an integer number (109297486906).

Almost surely, 2^218594973811 is an apocalyptic number.

218594973811 is a deficient number, since it is larger than the sum of its proper divisors (1).

218594973811 is an equidigital number, since it uses as much as digits as its factorization.

218594973811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 58.

The spelling of 218594973811 in words is "two hundred eighteen billion, five hundred ninety-four million, nine hundred seventy-three thousand, eight hundred eleven".