168271717381 has 8 divisors (see below), whose sum is σ = 172158465920. Its totient is φ = 164428887168.

The previous prime is 168271717351. The next prime is 168271717399. The reversal of 168271717381 is 183717172861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168271717381 is a prime.

It is a super-2 number, since 2×168271717381² (a number of 23 digits) contains 22 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 (168271717331) 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 in 7 ways as a sum of consecutive naturals, for example, 10971831 + ... + 10987156.

It is an arithmetic number, because the mean of its divisors is an integer number (21519808240).

Almost surely, 2^168271717381 is an apocalyptic number.

It is an amenable number.

168271717381 is a deficient number, since it is larger than the sum of its proper divisors (3886748539).

168271717381 is an equidigital number, since it uses as much as digits as its factorization.

168271717381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21959163.

The product of its digits is 790272, while the sum is 52.

The spelling of 168271717381 in words is "one hundred sixty-eight billion, two hundred seventy-one million, seven hundred seventeen thousand, three hundred eighty-one".