27659888639 has 4 divisors (see below), whose sum is σ = 27666369120. Its totient is φ = 27653408160.

The previous prime is 27659888611. The next prime is 27659888657. The reversal of 27659888639 is 93688895672.

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 27659888639 - 2²⁴ = 27643111423 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 (27659887639) 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, 3233834 + ... + 3242375.

It is an arithmetic number, because the mean of its divisors is an integer number (6916592280).

Almost surely, 2^27659888639 is an apocalyptic number.

27659888639 is a deficient number, since it is larger than the sum of its proper divisors (6480481).

27659888639 is an equidigital number, since it uses as much as digits as its factorization.

27659888639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6480480.

The product of its digits is 313528320, while the sum is 71.

The spelling of 27659888639 in words is "twenty-seven billion, six hundred fifty-nine million, eight hundred eighty-eight thousand, six hundred thirty-nine".