180916081 has 8 divisors (see below), whose sum is σ = 190745280. Its totient is φ = 171117648.

The previous prime is 180916079. The next prime is 180916097. The reversal of 180916081 is 180619081.

180916081 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 180916081 - 2¹ = 180916079 is a prime.

It is a super-2 number, since 2×180916081² = 65461256728797122, which contains 22 as substring.

180916081 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180916061) 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, 4935 + ... + 19651.

It is an arithmetic number, because the mean of its divisors is an integer number (23843160).

Almost surely, 2^180916081 is an apocalyptic number.

It is an amenable number.

180916081 is a deficient number, since it is larger than the sum of its proper divisors (9829199).

180916081 is a wasteful number, since it uses less digits than its factorization.

180916081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15383.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 180916081 is about 13450.5048604132. The cubic root of 180916081 is about 565.5778472175.

The spelling of 180916081 in words is "one hundred eighty million, nine hundred sixteen thousand, eighty-one".