27560266161 has 4 divisors (see below), whose sum is σ = 36747021552. Its totient is φ = 18373510772.

The previous prime is 27560266147. The next prime is 27560266163. The reversal of 27560266161 is 16166206572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27560266161 - 2¹⁰ = 27560265137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27560266163) 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 3 ways as a sum of consecutive naturals, for example, 4593377691 + ... + 4593377696.

It is an arithmetic number, because the mean of its divisors is an integer number (9186755388).

Almost surely, 2^27560266161 is an apocalyptic number.

It is an amenable number.

27560266161 is a deficient number, since it is larger than the sum of its proper divisors (9186755391).

27560266161 is an equidigital number, since it uses as much as digits as its factorization.

27560266161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9186755390.

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 27560266161 in words is "twenty-seven billion, five hundred sixty million, two hundred sixty-six thousand, one hundred sixty-one".