27708385865 has 16 divisors (see below), whose sum is σ = 33660776448. Its totient is φ = 21894027456.

The previous prime is 27708385801. The next prime is 27708385877. The reversal of 27708385865 is 56858380772.

It is a cyclic number.

It is not a de Polignac number, because 27708385865 - 2⁶ = 27708385801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 127007 + ... + 267483.

It is an arithmetic number, because the mean of its divisors is an integer number (2103798528).

Almost surely, 2^27708385865 is an apocalyptic number.

It is an amenable number.

27708385865 is a deficient number, since it is larger than the sum of its proper divisors (5952390583).

27708385865 is a wasteful number, since it uses less digits than its factorization.

27708385865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140968.

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 27708385865 in words is "twenty-seven billion, seven hundred eight million, three hundred eighty-five thousand, eight hundred sixty-five".