27161705566018 has 16 divisors (see below), whose sum is σ = 41421025688256. Its totient is φ = 13354810514640.

The previous prime is 27161705566013. The next prime is 27161705566087. The reversal of 27161705566018 is 81066550716172.

It is a self number, because there is not a number n which added to its sum of digits gives 27161705566018.

It is not an unprimeable number, because it can be changed into a prime (27161705566013) 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 7 ways as a sum of consecutive naturals, for example, 27897246 + ... + 28854457.

It is an arithmetic number, because the mean of its divisors is an integer number (2588814105516).

Almost surely, 2^{27161705566018} is an apocalyptic number.

27161705566018 is a deficient number, since it is larger than the sum of its proper divisors (14259320122238).

27161705566018 is a wasteful number, since it uses less digits than its factorization.

27161705566018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56755689.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 27161705566018 in words is "twenty-seven trillion, one hundred sixty-one billion, seven hundred five million, five hundred sixty-six thousand, eighteen".