168955644985949 has 2 divisors, whose sum is σ = 168955644985950. Its totient is φ = 168955644985948.

The previous prime is 168955644985867. The next prime is 168955644985969. The reversal of 168955644985949 is 949589446559861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127116830652100 + 41838814333849 = 11274610^2 + 6468293^2 .

It is a cyclic number.

It is not a de Polignac number, because 168955644985949 - 2²⁴ = 168955628208733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168955644985969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84477822492974 + 84477822492975.

It is an arithmetic number, because the mean of its divisors is an integer number (84477822492975).

Almost surely, 2^{168955644985949} is an apocalyptic number.

It is an amenable number.

168955644985949 is a deficient number, since it is larger than the sum of its proper divisors (1).

168955644985949 is an equidigital number, since it uses as much as digits as its factorization.

168955644985949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120932352000, while the sum is 92.

The spelling of 168955644985949 in words is "one hundred sixty-eight trillion, nine hundred fifty-five billion, six hundred forty-four million, nine hundred eighty-five thousand, nine hundred forty-nine".