27181394339 has 4 divisors (see below), whose sum is σ = 29652430200. Its totient is φ = 24710358480.

The previous prime is 27181394327. The next prime is 27181394353. The reversal of 27181394339 is 93349318172.

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

It is a cyclic number.

It is not a de Polignac number, because 27181394339 - 2¹⁶ = 27181328803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27181394039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1235517914 + ... + 1235517935.

It is an arithmetic number, because the mean of its divisors is an integer number (7413107550).

Almost surely, 2^27181394339 is an apocalyptic number.

27181394339 is a deficient number, since it is larger than the sum of its proper divisors (2471035861).

27181394339 is a wasteful number, since it uses less digits than its factorization.

27181394339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2471035860.

The product of its digits is 979776, while the sum is 50.

The spelling of 27181394339 in words is "twenty-seven billion, one hundred eighty-one million, three hundred ninety-four thousand, three hundred thirty-nine".