181490484289 has 9 divisors (see below), whose sum is σ = 182655362721. Its totient is φ = 180332996100.

The previous prime is 181490484271. The next prime is 181490484317. The reversal of 181490484289 is 982484094181.

The square root of 181490484289 is 426017.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 181490484289 - 2²⁷ = 181356266561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181490484689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 71143564 + ... + 71146114.

Almost surely, 2^181490484289 is an apocalyptic number.

181490484289 is the 426017-th square number.

181490484289 is the 213009-th centered octagonal number.

It is an amenable number.

181490484289 is a deficient number, since it is larger than the sum of its proper divisors (1164878432).

181490484289 is an frugal number, since it uses more digits than its factorization.

181490484289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5436 (or 2718 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 58.

The spelling of 181490484289 in words is "one hundred eighty-one billion, four hundred ninety million, four hundred eighty-four thousand, two hundred eighty-nine".