181493892441 has 9 divisors (see below), whose sum is σ = 262159690741. Its totient is φ = 120995076252.

The previous prime is 181493892427. The next prime is 181493892479. The reversal of 181493892441 is 144298394181.

The square root of 181493892441 is 426021.

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

181493892441 is a `hidden beast` number, since 1 + 8 + 14 + 9 + 389 + 244 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 181493892441 - 2¹³ = 181493884249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181493892241) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1207060 + ... + 1349066.

Almost surely, 2^181493892441 is an apocalyptic number.

181493892441 is the 426021-st square number.

181493892441 is the 213011-st centered octagonal number.

It is an amenable number.

181493892441 is a deficient number, since it is larger than the sum of its proper divisors (80665798300).

181493892441 is an frugal number, since it uses more digits than its factorization.

181493892441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284020 (or 142010 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The spelling of 181493892441 in words is "one hundred eighty-one billion, four hundred ninety-three million, eight hundred ninety-two thousand, four hundred forty-one".