181671160441 has 3 divisors (see below), whose sum is σ = 181671586671. Its totient is φ = 181670734212.

The previous prime is 181671160439. The next prime is 181671160457. The reversal of 181671160441 is 144061176181.

The square root of 181671160441 is 426229.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 450670441 + 181220490000 = 21229^2 + 425700^2 .

It is not a de Polignac number, because 181671160441 - 2¹ = 181671160439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181671160394 and 181671160403.

It is not an unprimeable number, because it can be changed into a prime (181671160241) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 213115 + ... + 639343.

It is an arithmetic number, because the mean of its divisors is an integer number (60557195557).

Almost surely, 2^181671160441 is an apocalyptic number.

181671160441 is the 426229-th square number.

181671160441 is the 213115-th centered octagonal number.

It is an amenable number.

181671160441 is a deficient number, since it is larger than the sum of its proper divisors (426230).

181671160441 is an frugal number, since it uses more digits than its factorization.

181671160441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852458 (or 426229 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 181671160441 in words is "one hundred eighty-one billion, six hundred seventy-one million, one hundred sixty thousand, four hundred forty-one".