8556081161 has 2 divisors, whose sum is σ = 8556081162. Its totient is φ = 8556081160.

The previous prime is 8556081109. The next prime is 8556081203. The reversal of 8556081161 is 1611806558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5127276025 + 3428805136 = 71605^2 + 58556^2 .

It is a cyclic number.

It is not a de Polignac number, because 8556081161 - 2¹⁸ = 8555819017 is a prime.

It is not a weakly prime, because it can be changed into another prime (8556081361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278040580 + 4278040581.

It is an arithmetic number, because the mean of its divisors is an integer number (4278040581).

Almost surely, 2^8556081161 is an apocalyptic number.

It is an amenable number.

8556081161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8556081161 is an equidigital number, since it uses as much as digits as its factorization.

8556081161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 8556081161 is about 92499.0873522545. The cubic root of 8556081161 is about 2045.3060288900.

The spelling of 8556081161 in words is "eight billion, five hundred fifty-six million, eighty-one thousand, one hundred sixty-one".