27263216161 has 2 divisors, whose sum is σ = 27263216162. Its totient is φ = 27263216160.

The previous prime is 27263216159. The next prime is 27263216243. The reversal of 27263216161 is 16161236272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17944209936 + 9319006225 = 133956^2 + 96535^2 .

It is a cyclic number.

It is not a de Polignac number, because 27263216161 - 2¹ = 27263216159 is a prime.

Together with 27263216159, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 27263216161.

It is not a weakly prime, because it can be changed into another prime (27263216861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13631608080 + 13631608081.

It is an arithmetic number, because the mean of its divisors is an integer number (13631608081).

Almost surely, 2^27263216161 is an apocalyptic number.

It is an amenable number.

27263216161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27263216161 is an equidigital number, since it uses as much as digits as its factorization.

27263216161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The spelling of 27263216161 in words is "twenty-seven billion, two hundred sixty-three million, two hundred sixteen thousand, one hundred sixty-one".