218432271052609 has 2 divisors, whose sum is σ = 218432271052610. Its totient is φ = 218432271052608.

The previous prime is 218432271052603. The next prime is 218432271052673. The reversal of 218432271052609 is 906250172234812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202910680387584 + 15521590665025 = 14244672^2 + 3939745^2 .

It is a cyclic number.

It is not a de Polignac number, because 218432271052609 - 2¹¹ = 218432271050561 is a prime.

It is not a weakly prime, because it can be changed into another prime (218432271052603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109216135526304 + 109216135526305.

It is an arithmetic number, because the mean of its divisors is an integer number (109216135526305).

It is a 1-persistent number, because it is pandigital, but 2⋅218432271052609 = 436864542105218 is not.

Almost surely, 2^{218432271052609} is an apocalyptic number.

It is an amenable number.

218432271052609 is a deficient number, since it is larger than the sum of its proper divisors (1).

218432271052609 is an equidigital number, since it uses as much as digits as its factorization.

218432271052609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 218432271052609 in words is "two hundred eighteen trillion, four hundred thirty-two billion, two hundred seventy-one million, fifty-two thousand, six hundred nine".