180115489 has 8 divisors (see below), whose sum is σ = 181672640. Its totient is φ = 178564176.

The previous prime is 180115469. The next prime is 180115499. The reversal of 180115489 is 984511081.

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

It is a 3-Lehmer number, since φ(180115489) divides (180115489-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 180115489 - 2⁵ = 180115457 is a prime.

It is a deceptive number, since it divides R_180115488.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180115469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78247 + ... + 80515.

It is an arithmetic number, because the mean of its divisors is an integer number (22709080).

It is a Poulet number, since it divides 2^180115488-1.

Almost surely, 2^180115489 is an apocalyptic number.

It is an amenable number.

180115489 is a deficient number, since it is larger than the sum of its proper divisors (1557151).

180115489 is a wasteful number, since it uses less digits than its factorization.

180115489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 180115489 is about 13420.7111957601. The cubic root of 180115489 is about 564.7423463010.

The spelling of 180115489 in words is "one hundred eighty million, one hundred fifteen thousand, four hundred eighty-nine".