27445554889 has 3 divisors (see below), whose sum is σ = 27445720557. Its totient is φ = 27445389222.

The previous prime is 27445554863. The next prime is 27445554893. The reversal of 27445554889 is 98845554472.

The square root of 27445554889 is 165667.

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 not a de Polignac number, because 27445554889 - 2⁷ = 27445554761 is a prime.

It is a super-2 number, since 2×27445554889² (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 (27445554809) 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, 82834 + ... + 248500.

It is an arithmetic number, because the mean of its divisors is an integer number (9148573519).

Almost surely, 2^27445554889 is an apocalyptic number.

27445554889 is the 165667-th square number.

27445554889 is the 82834-th centered octagonal number.

It is an amenable number.

27445554889 is a deficient number, since it is larger than the sum of its proper divisors (165668).

27445554889 is an frugal number, since it uses more digits than its factorization.

27445554889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331334 (or 165667 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 61.

The spelling of 27445554889 in words is "twenty-seven billion, four hundred forty-five million, five hundred fifty-four thousand, eight hundred eighty-nine".