197166785305 has 12 divisors (see below), whose sum is σ = 275228737380. Its totient is φ = 135200081184.

The previous prime is 197166785297. The next prime is 197166785317. The reversal of 197166785305 is 503587661791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 121151332624 + 76015452681 = 348068^2 + 275709^2 .

It is not a de Polignac number, because 197166785305 - 2³ = 197166785297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197166785305.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 402380950 + ... + 402381439.

It is an arithmetic number, because the mean of its divisors is an integer number (22935728115).

Almost surely, 2^197166785305 is an apocalyptic number.

It is an amenable number.

197166785305 is a deficient number, since it is larger than the sum of its proper divisors (78061952075).

197166785305 is an equidigital number, since it uses as much as digits as its factorization.

197166785305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804762408 (or 804762401 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 58.

The spelling of 197166785305 in words is "one hundred ninety-seven billion, one hundred sixty-six million, seven hundred eighty-five thousand, three hundred five".