180981955 has 16 divisors (see below), whose sum is σ = 270768384. Its totient is φ = 112819680.

The previous prime is 180981919. The next prime is 180981959. The reversal of 180981955 is 559189081.

It is not a de Polignac number, because 180981955 - 2¹⁵ = 180949187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180981959) 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, 234657 + ... + 235426.

It is an arithmetic number, because the mean of its divisors is an integer number (16923024).

Almost surely, 2^180981955 is an apocalyptic number.

180981955 is a deficient number, since it is larger than the sum of its proper divisors (89786429).

180981955 is a wasteful number, since it uses less digits than its factorization.

180981955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470106.

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 180981955 is about 13452.9533932144. The cubic root of 180981955 is about 565.6464837439.

The spelling of 180981955 in words is "one hundred eighty million, nine hundred eighty-one thousand, nine hundred fifty-five".