8561490271 has 2 divisors, whose sum is σ = 8561490272. Its totient is φ = 8561490270.

The previous prime is 8561490253. The next prime is 8561490283. The reversal of 8561490271 is 1720941658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8561490271 - 2¹⁵ = 8561457503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8561490221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4280745135 + 4280745136.

It is an arithmetic number, because the mean of its divisors is an integer number (4280745136).

Almost surely, 2^8561490271 is an apocalyptic number.

8561490271 is a deficient number, since it is larger than the sum of its proper divisors (1).

8561490271 is an equidigital number, since it uses as much as digits as its factorization.

8561490271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 8561490271 is about 92528.3214534880. The cubic root of 8561490271 is about 2045.7369487048.

The spelling of 8561490271 in words is "eight billion, five hundred sixty-one million, four hundred ninety thousand, two hundred seventy-one".