27816569089 has 3 divisors (see below), whose sum is σ = 27816735873. Its totient is φ = 27816402306.

The previous prime is 27816569083. The next prime is 27816569101. The reversal of 27816569089 is 98096561872.

The square root of 27816569089 is 166783.

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 is a de Polignac number, because none of the positive numbers 2^k-27816569089 is a prime.

It is a super-2 number, since 2×27816569089² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27816569083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 83392 + ... + 250174.

It is an arithmetic number, because the mean of its divisors is an integer number (9272245291).

Almost surely, 2^27816569089 is an apocalyptic number.

27816569089 is the 166783-rd square number.

27816569089 is the 83392-nd centered octagonal number.

It is an amenable number.

27816569089 is a deficient number, since it is larger than the sum of its proper divisors (166784).

27816569089 is an frugal number, since it uses more digits than its factorization.

27816569089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333566 (or 166783 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 27816569089 in words is "twenty-seven billion, eight hundred sixteen million, five hundred sixty-nine thousand, eighty-nine".