180985619117 has 16 divisors (see below), whose sum is σ = 184399441920. Its totient is φ = 177597168000.

The previous prime is 180985619083. The next prime is 180985619131. The reversal of 180985619117 is 711916589081.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 180985619117 - 2¹² = 180985615021 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 (180985619167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21978833 + ... + 21987065.

It is an arithmetic number, because the mean of its divisors is an integer number (11524965120).

Almost surely, 2^180985619117 is an apocalyptic number.

It is an amenable number.

180985619117 is a deficient number, since it is larger than the sum of its proper divisors (3413822803).

180985619117 is a wasteful number, since it uses less digits than its factorization.

180985619117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9724.

The product of its (nonzero) digits is 1088640, while the sum is 56.

The spelling of 180985619117 in words is "one hundred eighty billion, nine hundred eighty-five million, six hundred nineteen thousand, one hundred seventeen".