180823985 has 8 divisors (see below), whose sum is σ = 229752936. Its totient is φ = 136149760.

The previous prime is 180823963. The next prime is 180824003. The reversal of 180823985 is 589328081.

It can be written as a sum of positive squares in 4 ways, for example, as 90022144 + 90801841 = 9488^2 + 9529^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-180823985 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1063586 + ... + 1063755.

It is an arithmetic number, because the mean of its divisors is an integer number (28719117).

Almost surely, 2^180823985 is an apocalyptic number.

It is an amenable number.

180823985 is a deficient number, since it is larger than the sum of its proper divisors (48928951).

180823985 is a wasteful number, since it uses less digits than its factorization.

180823985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127363.

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 180823985 is about 13447.0809099968. The cubic root of 180823985 is about 565.4818610968.

The spelling of 180823985 in words is "one hundred eighty million, eight hundred twenty-three thousand, nine hundred eighty-five".