8558998561 has 2 divisors, whose sum is σ = 8558998562. Its totient is φ = 8558998560.

The previous prime is 8558998541. The next prime is 8558998573. The reversal of 8558998561 is 1658998558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8140550625 + 418447936 = 90225^2 + 20456^2 .

It is a cyclic number.

It is not a de Polignac number, because 8558998561 - 2⁵ = 8558998529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8558998493 and 8558998502.

It is not a weakly prime, because it can be changed into another prime (8558998541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4279499280 + 4279499281.

It is an arithmetic number, because the mean of its divisors is an integer number (4279499281).

Almost surely, 2^8558998561 is an apocalyptic number.

It is an amenable number.

8558998561 is a deficient number, since it is larger than the sum of its proper divisors (1).

8558998561 is an equidigital number, since it uses as much as digits as its factorization.

8558998561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104000, while the sum is 64.

The square root of 8558998561 is about 92514.8558935266. The cubic root of 8558998561 is about 2045.5384677691.

The spelling of 8558998561 in words is "eight billion, five hundred fifty-eight million, nine hundred ninety-eight thousand, five hundred sixty-one".