27688550556 has 24 divisors (see below), whose sum is σ = 68407007760. Its totient is φ = 8686604032.

The previous prime is 27688550551. The next prime is 27688550557. The reversal of 27688550556 is 65505588672.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 27688550496 and 27688550505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27688550551) 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 7 ways as a sum of consecutive naturals, for example, 67863891 + ... + 67864298.

It is an arithmetic number, because the mean of its divisors is an integer number (2850291990).

Almost surely, 2^27688550556 is an apocalyptic number.

It is an amenable number.

27688550556 is an abundant number, since it is smaller than the sum of its proper divisors (40718457204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27688550556 is a wasteful number, since it uses less digits than its factorization.

27688550556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135728213 (or 135728211 counting only the distinct ones).

The product of its (nonzero) digits is 20160000, while the sum is 57.

The spelling of 27688550556 in words is "twenty-seven billion, six hundred eighty-eight million, five hundred fifty thousand, five hundred fifty-six".