27806816788 has 12 divisors (see below), whose sum is σ = 48691202560. Its totient is φ = 13895044632.

The previous prime is 27806816777. The next prime is 27806816801. The reversal of 27806816788 is 88761860872.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 2083458 + ... + 2096761.

Almost surely, 2^27806816788 is an apocalyptic number.

It is an amenable number.

27806816788 is a deficient number, since it is larger than the sum of its proper divisors (20884385772).

27806816788 is a wasteful number, since it uses less digits than its factorization.

27806816788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181886 (or 4181884 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 61.

The spelling of 27806816788 in words is "twenty-seven billion, eight hundred six million, eight hundred sixteen thousand, seven hundred eighty-eight".