8556198061 has 2 divisors, whose sum is σ = 8556198062. Its totient is φ = 8556198060.

The previous prime is 8556198043. The next prime is 8556198067. The reversal of 8556198061 is 1608916558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5878135561 + 2678062500 = 76669^2 + 51750^2 .

It is a cyclic number.

It is not a de Polignac number, because 8556198061 - 2⁹ = 8556197549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8556197996 and 8556198014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8556198067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278099030 + 4278099031.

It is an arithmetic number, because the mean of its divisors is an integer number (4278099031).

Almost surely, 2^8556198061 is an apocalyptic number.

It is an amenable number.

8556198061 is a deficient number, since it is larger than the sum of its proper divisors (1).

8556198061 is an equidigital number, since it uses as much as digits as its factorization.

8556198061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 8556198061 is about 92499.7192482226. The cubic root of 8556198061 is about 2045.3153437146.

It can be divided in two parts, 855 and 6198061, that added together give a palindrome (6198916).

The spelling of 8556198061 in words is "eight billion, five hundred fifty-six million, one hundred ninety-eight thousand, sixty-one".