168801681 has 8 divisors (see below), whose sum is σ = 236914720. Its totient is φ = 106611552.

The previous prime is 168801679. The next prime is 168801697. The reversal of 168801681 is 186108861.

168801681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 168801681 - 2¹ = 168801679 is a prime.

It is a super-2 number, since 2×168801681² = 56988015016851522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168801181) 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, 1480660 + ... + 1480773.

It is an arithmetic number, because the mean of its divisors is an integer number (29614340).

Almost surely, 2^168801681 is an apocalyptic number.

It is an amenable number.

168801681 is a deficient number, since it is larger than the sum of its proper divisors (68113039).

168801681 is a wasteful number, since it uses less digits than its factorization.

168801681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961455.

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 168801681 is about 12992.3701071052. The cubic root of 168801681 is about 552.6611322030.

The spelling of 168801681 in words is "one hundred sixty-eight million, eight hundred one thousand, six hundred eighty-one".