180981954 has 48 divisors (see below), whose sum is σ = 422866080. Its totient is φ = 55753920.

The previous prime is 180981919. The next prime is 180981959. The reversal of 180981954 is 459189081.

It is not an unprimeable number, because it can be changed into a prime (180981959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7569 + ... + 20475.

It is an arithmetic number, because the mean of its divisors is an integer number (8809710).

Almost surely, 2^180981954 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180981954, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211433040).

180981954 is an abundant number, since it is smaller than the sum of its proper divisors (241884126).

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

180981954 is a wasteful number, since it uses less digits than its factorization.

180981954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12975 (or 12972 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 180981954 is about 13452.9533560479. The cubic root of 180981954 is about 565.6464827021.

The spelling of 180981954 in words is "one hundred eighty million, nine hundred eighty-one thousand, nine hundred fifty-four".