27555539726856 has 128 divisors (see below), whose sum is σ = 72288201427200. Its totient is φ = 8741103759360.

The previous prime is 27555539726831. The next prime is 27555539726933. The reversal of 27555539726856 is 65862793555572.

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 31 ways as a sum of consecutive naturals, for example, 181429060 + ... + 181580876.

It is an arithmetic number, because the mean of its divisors is an integer number (564751573650).

Almost surely, 2^{27555539726856} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27555539726856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36144100713600).

27555539726856 is an abundant number, since it is smaller than the sum of its proper divisors (44732661700344).

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

27555539726856 is a wasteful number, since it uses less digits than its factorization.

27555539726856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155599 (or 155595 counting only the distinct ones).

The product of its digits is 4762800000, while the sum is 75.

The spelling of 27555539726856 in words is "twenty-seven trillion, five hundred fifty-five billion, five hundred thirty-nine million, seven hundred twenty-six thousand, eight hundred fifty-six".