180985619109 has 8 divisors (see below), whose sum is σ = 242912266432. Its totient is φ = 119858025600.

The previous prime is 180985619083. The next prime is 180985619131. The reversal of 180985619109 is 901916589081.

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

It is not a de Polignac number, because 180985619109 - 2⁵ = 180985619077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180985619179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199762924 + ... + 199763829.

It is an arithmetic number, because the mean of its divisors is an integer number (30364033304).

Almost surely, 2^180985619109 is an apocalyptic number.

It is an amenable number.

180985619109 is a deficient number, since it is larger than the sum of its proper divisors (61926647323).

180985619109 is a wasteful number, since it uses less digits than its factorization.

180985619109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399526907.

The product of its (nonzero) digits is 1399680, while the sum is 57.

The spelling of 180985619109 in words is "one hundred eighty billion, nine hundred eighty-five million, six hundred nineteen thousand, one hundred nine".