168030385891 has 2 divisors, whose sum is σ = 168030385892. Its totient is φ = 168030385890.

The previous prime is 168030385889. The next prime is 168030385949. The reversal of 168030385891 is 198583030861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168030385891 - 2¹ = 168030385889 is a prime.

Together with 168030385889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168030385801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84015192945 + 84015192946.

It is an arithmetic number, because the mean of its divisors is an integer number (84015192946).

Almost surely, 2^168030385891 is an apocalyptic number.

168030385891 is a deficient number, since it is larger than the sum of its proper divisors (1).

168030385891 is an equidigital number, since it uses as much as digits as its factorization.

168030385891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 168030385891 in words is "one hundred sixty-eight billion, thirty million, three hundred eighty-five thousand, eight hundred ninety-one".