168130381889 has 2 divisors, whose sum is σ = 168130381890. Its totient is φ = 168130381888.

The previous prime is 168130381831. The next prime is 168130381891. The reversal of 168130381889 is 988183031861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167144421889 + 985960000 = 408833^2 + 31400^2 .

It is a cyclic number.

It is not a de Polignac number, because 168130381889 - 2²⁸ = 167861946433 is a prime.

Together with 168130381891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (168130381829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84065190944 + 84065190945.

It is an arithmetic number, because the mean of its divisors is an integer number (84065190945).

Almost surely, 2^168130381889 is an apocalyptic number.

It is an amenable number.

168130381889 is a deficient number, since it is larger than the sum of its proper divisors (1).

168130381889 is an equidigital number, since it uses as much as digits as its factorization.

168130381889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 56.

The spelling of 168130381889 in words is "one hundred sixty-eight billion, one hundred thirty million, three hundred eighty-one thousand, eight hundred eighty-nine".