27272027161 has 4 divisors (see below), whose sum is σ = 27310932324. Its totient is φ = 27233122000.

The previous prime is 27272027137. The next prime is 27272027177. The reversal of 27272027161 is 16172027272.

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 19520281225 + 7751745936 = 139715^2 + 88044^2 .

It is a cyclic number.

It is not a de Polignac number, because 27272027161 - 2⁵ = 27272027129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27272027161.

It is not an unprimeable number, because it can be changed into a prime (27272027561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19451530 + ... + 19452931.

It is an arithmetic number, because the mean of its divisors is an integer number (6827733081).

Almost surely, 2^27272027161 is an apocalyptic number.

It is an amenable number.

27272027161 is a deficient number, since it is larger than the sum of its proper divisors (38905163).

27272027161 is an equidigital number, since it uses as much as digits as its factorization.

27272027161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38905162.

The product of its (nonzero) digits is 32928, while the sum is 37.

The spelling of 27272027161 in words is "twenty-seven billion, two hundred seventy-two million, twenty-seven thousand, one hundred sixty-one".