27983665866239 has 8 divisors (see below), whose sum is σ = 28015017168960. Its totient is φ = 27952315955200.

The previous prime is 27983665866209. The next prime is 27983665866311. The reversal of 27983665866239 is 93266856638972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27983665866239 - 2²⁰ = 27983664817663 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 (27983665866209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42895007 + ... + 43542495.

It is an arithmetic number, because the mean of its divisors is an integer number (3501877146120).

Almost surely, 2^{27983665866239} is an apocalyptic number.

27983665866239 is a deficient number, since it is larger than the sum of its proper divisors (31351302721).

27983665866239 is an equidigital number, since it uses as much as digits as its factorization.

27983665866239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695841.

The product of its digits is 8465264640, while the sum is 80.

The spelling of 27983665866239 in words is "twenty-seven trillion, nine hundred eighty-three billion, six hundred sixty-five million, eight hundred sixty-six thousand, two hundred thirty-nine".