161168161 has 16 divisors (see below), whose sum is σ = 204236928. Its totient is φ = 123523200.

The previous prime is 161168129. The next prime is 161168191. The reversal of 161168161 is 161861161.

161168161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161168161 - 2⁵ = 161168129 is a prime.

It is a super-2 number, since 2×161168161² = 51950352240243842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161168191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12460 + ... + 21853.

It is an arithmetic number, because the mean of its divisors is an integer number (12764808).

Almost surely, 2^161168161 is an apocalyptic number.

161168161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161168161 is a deficient number, since it is larger than the sum of its proper divisors (43068767).

161168161 is a wasteful number, since it uses less digits than its factorization.

161168161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34392.

The product of its digits is 1728, while the sum is 31.

The square root of 161168161 is about 12695.2022827523. The cubic root of 161168161 is about 544.2015196034.

The spelling of 161168161 in words is "one hundred sixty-one million, one hundred sixty-eight thousand, one hundred sixty-one".