165210210254189 has 2 divisors, whose sum is σ = 165210210254190. Its totient is φ = 165210210254188.

The previous prime is 165210210254071. The next prime is 165210210254203. The reversal of 165210210254189 is 981452012012561.

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., 96802969322500 + 68407240931689 = 9838850^2 + 8270867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165210210254189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165210210254489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82605105127094 + 82605105127095.

It is an arithmetic number, because the mean of its divisors is an integer number (82605105127095).

Almost surely, 2^{165210210254189} is an apocalyptic number.

It is an amenable number.

165210210254189 is a deficient number, since it is larger than the sum of its proper divisors (1).

165210210254189 is an equidigital number, since it uses as much as digits as its factorization.

165210210254189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 165210210254189 in words is "one hundred sixty-five trillion, two hundred ten billion, two hundred ten million, two hundred fifty-four thousand, one hundred eighty-nine".