27947814539 has 4 divisors (see below), whose sum is σ = 27974107056. Its totient is φ = 27921522024.

The previous prime is 27947814511. The next prime is 27947814541. The reversal of 27947814539 is 93541874972.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27947814539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27947814239) 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 3 ways as a sum of consecutive naturals, for example, 13144664 + ... + 13146789.

It is an arithmetic number, because the mean of its divisors is an integer number (6993526764).

Almost surely, 2^27947814539 is an apocalyptic number.

27947814539 is a deficient number, since it is larger than the sum of its proper divisors (26292517).

27947814539 is a wasteful number, since it uses less digits than its factorization.

27947814539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26292516.

The product of its digits is 15240960, while the sum is 59.

The spelling of 27947814539 in words is "twenty-seven billion, nine hundred forty-seven million, eight hundred fourteen thousand, five hundred thirty-nine".