198486180829961 has 2 divisors, whose sum is σ = 198486180829962. Its totient is φ = 198486180829960.

The previous prime is 198486180829949. The next prime is 198486180830027. The reversal of 198486180829961 is 169928081684891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100303349704336 + 98182831125625 = 10015156^2 + 9908725^2 .

It is a cyclic number.

It is not a de Polignac number, because 198486180829961 - 2³⁴ = 198469000960777 is a prime.

It is not a weakly prime, because it can be changed into another prime (198486180828961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99243090414980 + 99243090414981.

It is an arithmetic number, because the mean of its divisors is an integer number (99243090414981).

Almost surely, 2^{198486180829961} is an apocalyptic number.

It is an amenable number.

198486180829961 is a deficient number, since it is larger than the sum of its proper divisors (1).

198486180829961 is an equidigital number, since it uses as much as digits as its factorization.

198486180829961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 859963392, while the sum is 80.

The spelling of 198486180829961 in words is "one hundred ninety-eight trillion, four hundred eighty-six billion, one hundred eighty million, eight hundred twenty-nine thousand, nine hundred sixty-one".