168659452849 has 2 divisors, whose sum is σ = 168659452850. Its totient is φ = 168659452848.

The previous prime is 168659452837. The next prime is 168659452877. The reversal of 168659452849 is 948254956861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166182599025 + 2476853824 = 407655^2 + 49768^2 .

It is a cyclic number.

It is not a de Polignac number, because 168659452849 - 2¹⁹ = 168658928561 is a prime.

It is a super-2 number, since 2×168659452849² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168659452649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84329726424 + 84329726425.

It is an arithmetic number, because the mean of its divisors is an integer number (84329726425).

Almost surely, 2^168659452849 is an apocalyptic number.

It is an amenable number.

168659452849 is a deficient number, since it is larger than the sum of its proper divisors (1).

168659452849 is an equidigital number, since it uses as much as digits as its factorization.

168659452849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 149299200, while the sum is 67.

The spelling of 168659452849 in words is "one hundred sixty-eight billion, six hundred fifty-nine million, four hundred fifty-two thousand, eight hundred forty-nine".