168427866917 has 4 divisors (see below), whose sum is σ = 168541135296. Its totient is φ = 168314598540.

The previous prime is 168427866899. The next prime is 168427866941. The reversal of 168427866917 is 719668724861.

168427866917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 719668724861 = 87691 ⋅8206871.

It is a cyclic number.

It is not a de Polignac number, because 168427866917 - 2¹⁴ = 168427850533 is a prime.

It is a super-3 number, since 3×168427866917³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168427866517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56631959 + ... + 56634932.

It is an arithmetic number, because the mean of its divisors is an integer number (42135283824).

Almost surely, 2^168427866917 is an apocalyptic number.

It is an amenable number.

168427866917 is a deficient number, since it is larger than the sum of its proper divisors (113268379).

168427866917 is a wasteful number, since it uses less digits than its factorization.

168427866917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113268378.

The product of its digits is 48771072, while the sum is 65.

The spelling of 168427866917 in words is "one hundred sixty-eight billion, four hundred twenty-seven million, eight hundred sixty-six thousand, nine hundred seventeen".