271216809161 has 2 divisors, whose sum is σ = 271216809162. Its totient is φ = 271216809160.

The previous prime is 271216809107. The next prime is 271216809187. The reversal of 271216809161 is 161908612172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269626793536 + 1590015625 = 519256^2 + 39875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-271216809161 is a prime.

It is not a weakly prime, because it can be changed into another prime (271216109161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135608404580 + 135608404581.

It is an arithmetic number, because the mean of its divisors is an integer number (135608404581).

Almost surely, 2^271216809161 is an apocalyptic number.

It is an amenable number.

271216809161 is a deficient number, since it is larger than the sum of its proper divisors (1).

271216809161 is an equidigital number, since it uses as much as digits as its factorization.

271216809161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 271216809161 in words is "two hundred seventy-one billion, two hundred sixteen million, eight hundred nine thousand, one hundred sixty-one".