197111636342561 has 2 divisors, whose sum is σ = 197111636342562. Its totient is φ = 197111636342560.

The previous prime is 197111636342539. The next prime is 197111636342597. The reversal of 197111636342561 is 165243636111791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196657570606225 + 454065736336 = 14023465^2 + 673844^2 .

It is a cyclic number.

It is not a de Polignac number, because 197111636342561 - 2³⁰ = 197110562600737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197111636342497 and 197111636342506.

It is not a weakly prime, because it can be changed into another prime (197111636362561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98555818171280 + 98555818171281.

It is an arithmetic number, because the mean of its divisors is an integer number (98555818171281).

Almost surely, 2^{197111636342561} is an apocalyptic number.

It is an amenable number.

197111636342561 is a deficient number, since it is larger than the sum of its proper divisors (1).

197111636342561 is an equidigital number, since it uses as much as digits as its factorization.

197111636342561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The spelling of 197111636342561 in words is "one hundred ninety-seven trillion, one hundred eleven billion, six hundred thirty-six million, three hundred forty-two thousand, five hundred sixty-one".