27555500727121 has 4 divisors (see below), whose sum is σ = 27559630135972. Its totient is φ = 27551371318272.

The previous prime is 27555500727077. The next prime is 27555500727187. The reversal of 27555500727121 is 12172700555572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14482134691600 + 13073366035521 = 3805540^2 + 3615711^2 .

It is a cyclic number.

It is not a de Polignac number, because 27555500727121 - 2²¹ = 27555498629969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27555500727421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064694416 + ... + 2064707761.

It is an arithmetic number, because the mean of its divisors is an integer number (6889907533993).

Almost surely, 2^{27555500727121} is an apocalyptic number.

It is an amenable number.

27555500727121 is a deficient number, since it is larger than the sum of its proper divisors (4129408851).

27555500727121 is an equidigital number, since it uses as much as digits as its factorization.

27555500727121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129408850.

The product of its (nonzero) digits is 1715000, while the sum is 49.

The spelling of 27555500727121 in words is "twenty-seven trillion, five hundred fifty-five billion, five hundred million, seven hundred twenty-seven thousand, one hundred twenty-one".