27459818893 has 4 divisors (see below), whose sum is σ = 29572112668. Its totient is φ = 25347525120.

The previous prime is 27459818891. The next prime is 27459818909. The reversal of 27459818893 is 39881895472.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6750594244 + 20709224649 = 82162^2 + 143907^2 .

It is a cyclic number.

It is not a de Polignac number, because 27459818893 - 2¹ = 27459818891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27459818891) 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 3 ways as a sum of consecutive naturals, for example, 1056146868 + ... + 1056146893.

It is an arithmetic number, because the mean of its divisors is an integer number (7393028167).

Almost surely, 2^27459818893 is an apocalyptic number.

It is an amenable number.

27459818893 is a deficient number, since it is larger than the sum of its proper divisors (2112293775).

27459818893 is a wasteful number, since it uses less digits than its factorization.

27459818893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112293774.

The product of its digits is 34836480, while the sum is 64.

The spelling of 27459818893 in words is "twenty-seven billion, four hundred fifty-nine million, eight hundred eighteen thousand, eight hundred ninety-three".