216008135689 has 2 divisors, whose sum is σ = 216008135690. Its totient is φ = 216008135688.

The previous prime is 216008135671. The next prime is 216008135729. The reversal of 216008135689 is 986531800612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215381384464 + 626751225 = 464092^2 + 25035^2 .

It is a cyclic number.

It is not a de Polignac number, because 216008135689 - 2²³ = 215999747081 is a prime.

It is not a weakly prime, because it can be changed into another prime (216008135669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108004067844 + 108004067845.

It is an arithmetic number, because the mean of its divisors is an integer number (108004067845).

Almost surely, 2^216008135689 is an apocalyptic number.

It is an amenable number.

216008135689 is a deficient number, since it is larger than the sum of its proper divisors (1).

216008135689 is an equidigital number, since it uses as much as digits as its factorization.

216008135689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 216008135689 in words is "two hundred sixteen billion, eight million, one hundred thirty-five thousand, six hundred eighty-nine".