180985618678 has 4 divisors (see below), whose sum is σ = 271478428020. Its totient is φ = 90492809338.

The previous prime is 180985618673. The next prime is 180985618757. The reversal of 180985618678 is 876816589081.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180985618673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45246404668 + ... + 45246404671.

It is an arithmetic number, because the mean of its divisors is an integer number (67869607005).

Almost surely, 2^180985618678 is an apocalyptic number.

180985618678 is a deficient number, since it is larger than the sum of its proper divisors (90492809342).

180985618678 is an equidigital number, since it uses as much as digits as its factorization.

180985618678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90492809341.

The product of its (nonzero) digits is 46448640, while the sum is 67.

The spelling of 180985618678 in words is "one hundred eighty billion, nine hundred eighty-five million, six hundred eighteen thousand, six hundred seventy-eight".