197111636342539 has 2 divisors, whose sum is σ = 197111636342540. Its totient is φ = 197111636342538.

The previous prime is 197111636342519. The next prime is 197111636342561. The reversal of 197111636342539 is 935243636111791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197111636342539 - 2²⁷ = 197111502124811 is a prime.

It is not a weakly prime, because it can be changed into another prime (197111636342519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98555818171269 + 98555818171270.

It is an arithmetic number, because the mean of its divisors is an integer number (98555818171270).

Almost surely, 2^{197111636342539} is an apocalyptic number.

197111636342539 is a deficient number, since it is larger than the sum of its proper divisors (1).

197111636342539 is an equidigital number, since it uses as much as digits as its factorization.

197111636342539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22044960, while the sum is 61.

The spelling of 197111636342539 in words is "one hundred ninety-seven trillion, one hundred eleven billion, six hundred thirty-six million, three hundred forty-two thousand, five hundred thirty-nine".