168241681 has 8 divisors (see below), whose sum is σ = 174454784. Its totient is φ = 162077760.

The previous prime is 168241679. The next prime is 168241687. The reversal of 168241681 is 186142861.

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

It is a cyclic number.

It is not a de Polignac number, because 168241681 - 2¹ = 168241679 is a prime.

It is a super-2 number, since 2×168241681² = 56610526451411522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168241681.

It is not an unprimeable number, because it can be changed into a prime (168241687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5256 + ... + 19081.

It is an arithmetic number, because the mean of its divisors is an integer number (21806848).

Almost surely, 2^168241681 is an apocalyptic number.

It is an amenable number.

168241681 is a deficient number, since it is larger than the sum of its proper divisors (6213103).

168241681 is a wasteful number, since it uses less digits than its factorization.

168241681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24591.

The product of its digits is 18432, while the sum is 37.

The square root of 168241681 is about 12970.8010932247. The cubic root of 168241681 is about 552.0493035584.

The spelling of 168241681 in words is "one hundred sixty-eight million, two hundred forty-one thousand, six hundred eighty-one".