168377381017 has 2 divisors, whose sum is σ = 168377381018. Its totient is φ = 168377381016.

The previous prime is 168377380973. The next prime is 168377381071. The reversal of 168377381017 is 710183773861.

Together with next prime (168377381071) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130797232281 + 37580148736 = 361659^2 + 193856^2 .

It is an emirp because it is prime and its reverse (710183773861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168377381017 - 2¹⁹ = 168376856729 is a prime.

It is not a weakly prime, because it can be changed into another prime (168377385017) 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, 84188690508 + 84188690509.

It is an arithmetic number, because the mean of its divisors is an integer number (84188690509).

Almost surely, 2^168377381017 is an apocalyptic number.

It is an amenable number.

168377381017 is a deficient number, since it is larger than the sum of its proper divisors (1).

168377381017 is an equidigital number, since it uses as much as digits as its factorization.

168377381017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The spelling of 168377381017 in words is "one hundred sixty-eight billion, three hundred seventy-seven million, three hundred eighty-one thousand, seventeen".