181982065 has 16 divisors (see below), whose sum is σ = 224074368. Its totient is φ = 141837696.

The previous prime is 181982051. The next prime is 181982081. The reversal of 181982065 is 560289181.

It is a cyclic number.

It is not a de Polignac number, because 181982065 - 2⁷ = 181981937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27292 + ... + 33298.

It is an arithmetic number, because the mean of its divisors is an integer number (14004648).

Almost surely, 2^181982065 is an apocalyptic number.

It is an amenable number.

181982065 is a deficient number, since it is larger than the sum of its proper divisors (42092303).

181982065 is an equidigital number, since it uses as much as digits as its factorization.

181982065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6168.

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 181982065 is about 13490.0728315306. The cubic root of 181982065 is about 566.6864950770.

The spelling of 181982065 in words is "one hundred eighty-one million, nine hundred eighty-two thousand, sixty-five".