180992161 has 8 divisors (see below), whose sum is σ = 213981120. Its totient is φ = 149786448.

The previous prime is 180992153. The next prime is 180992177. The reversal of 180992161 is 161299081.

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

It is not a de Polignac number, because 180992161 - 2³ = 180992153 is a prime.

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 180992161.

It is not an unprimeable number, because it can be changed into a prime (180992111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445591 + ... + 445996.

It is an arithmetic number, because the mean of its divisors is an integer number (26747640).

Almost surely, 2^180992161 is an apocalyptic number.

It is an amenable number.

180992161 is a deficient number, since it is larger than the sum of its proper divisors (32988959).

180992161 is an equidigital number, since it uses as much as digits as its factorization.

180992161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891623.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 180992161 is about 13453.3327097786. The cubic root of 180992161 is about 565.6571162579.

The spelling of 180992161 in words is "one hundred eighty million, nine hundred ninety-two thousand, one hundred sixty-one".