27321775849 has 3 divisors (see below), whose sum is σ = 27321941143. Its totient is φ = 27321610556.

The previous prime is 27321775823. The next prime is 27321775861. The reversal of 27321775849 is 94857712372.

The square root of 27321775849 is 165293.

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., 22956795225 + 4364980624 = 151515^2 + 66068^2 .

It is not a de Polignac number, because 27321775849 - 2¹⁹ = 27321251561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27321775849.

It is not an unprimeable number, because it can be changed into a prime (27321775889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 82647 + ... + 247939.

Almost surely, 2^27321775849 is an apocalyptic number.

27321775849 is the 165293-rd square number.

27321775849 is the 82647-th centered octagonal number.

It is an amenable number.

27321775849 is a deficient number, since it is larger than the sum of its proper divisors (165294).

27321775849 is an frugal number, since it uses more digits than its factorization.

27321775849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330586 (or 165293 counting only the distinct ones).

The product of its digits is 5927040, while the sum is 55.

The spelling of 27321775849 in words is "twenty-seven billion, three hundred twenty-one million, seven hundred seventy-five thousand, eight hundred forty-nine".