180985619172 has 48 divisors (see below), whose sum is σ = 444024548352. Its totient is φ = 57265047840.

The previous prime is 180985619167. The next prime is 180985619173. The reversal of 180985619172 is 271916589081.

It is not an unprimeable number, because it can be changed into a prime (180985619173) 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 15 ways as a sum of consecutive naturals, for example, 2466688 + ... + 2538999.

It is an arithmetic number, because the mean of its divisors is an integer number (9250511424).

Almost surely, 2^180985619172 is an apocalyptic number.

180985619172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

180985619172 is an abundant number, since it is smaller than the sum of its proper divisors (263038929180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

180985619172 is a wasteful number, since it uses less digits than its factorization.

180985619172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005848 (or 5005846 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 57.

The spelling of 180985619172 in words is "one hundred eighty billion, nine hundred eighty-five million, six hundred nineteen thousand, one hundred seventy-two".