216004646189 has 2 divisors, whose sum is σ = 216004646190. Its totient is φ = 216004646188.

The previous prime is 216004646159. The next prime is 216004646201. The reversal of 216004646189 is 981646400612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189797892964 + 26206753225 = 435658^2 + 161885^2 .

It is a cyclic number.

It is not a de Polignac number, because 216004646189 - 2²⁰ = 216003597613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216004646159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108002323094 + 108002323095.

It is an arithmetic number, because the mean of its divisors is an integer number (108002323095).

Almost surely, 2^216004646189 is an apocalyptic number.

It is an amenable number.

216004646189 is a deficient number, since it is larger than the sum of its proper divisors (1).

216004646189 is an equidigital number, since it uses as much as digits as its factorization.

216004646189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 216004646189 in words is "two hundred sixteen billion, four million, six hundred forty-six thousand, one hundred eighty-nine".