218138441627 has 2 divisors, whose sum is σ = 218138441628. Its totient is φ = 218138441626.

The previous prime is 218138441617. The next prime is 218138441639. The reversal of 218138441627 is 726144831812.

218138441627 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 a de Polignac number, because none of the positive numbers 2^k-218138441627 is a prime.

It is not a weakly prime, because it can be changed into another prime (218138441617) 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, 109069220813 + 109069220814.

It is an arithmetic number, because the mean of its divisors is an integer number (109069220814).

Almost surely, 2^218138441627 is an apocalyptic number.

218138441627 is a deficient number, since it is larger than the sum of its proper divisors (1).

218138441627 is an equidigital number, since it uses as much as digits as its factorization.

218138441627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 47.

The spelling of 218138441627 in words is "two hundred eighteen billion, one hundred thirty-eight million, four hundred forty-one thousand, six hundred twenty-seven".