27744136161 has 16 divisors (see below), whose sum is σ = 42279180288. Its totient is φ = 15852891600.

The previous prime is 27744136159. The next prime is 27744136213. The reversal of 27744136161 is 16163144772.

It is not a de Polignac number, because 27744136161 - 2¹ = 27744136159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27744136361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569016 + ... + 615846.

It is an arithmetic number, because the mean of its divisors is an integer number (2642448768).

Almost surely, 2^27744136161 is an apocalyptic number.

27744136161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

27744136161 is a deficient number, since it is larger than the sum of its proper divisors (14535044127).

27744136161 is a wasteful number, since it uses less digits than its factorization.

27744136161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75052.

The product of its digits is 169344, while the sum is 42.

The spelling of 27744136161 in words is "twenty-seven billion, seven hundred forty-four million, one hundred thirty-six thousand, one hundred sixty-one".