198770081071 has 2 divisors, whose sum is σ = 198770081072. Its totient is φ = 198770081070.

The previous prime is 198770081039. The next prime is 198770081093. The reversal of 198770081071 is 170180077891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198770081071 - 2⁵ = 198770081039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198770088071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99385040535 + 99385040536.

It is an arithmetic number, because the mean of its divisors is an integer number (99385040536).

Almost surely, 2^198770081071 is an apocalyptic number.

198770081071 is a deficient number, since it is larger than the sum of its proper divisors (1).

198770081071 is an equidigital number, since it uses as much as digits as its factorization.

198770081071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 49.

The spelling of 198770081071 in words is "one hundred ninety-eight billion, seven hundred seventy million, eighty-one thousand, seventy-one".