197111636341523 has 2 divisors, whose sum is σ = 197111636341524. Its totient is φ = 197111636341522.

The previous prime is 197111636341519. The next prime is 197111636341553. The reversal of 197111636341523 is 325143636111791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197111636341523 - 2² = 197111636341519 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (197111636341553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98555818170761 + 98555818170762.

It is an arithmetic number, because the mean of its divisors is an integer number (98555818170762).

Almost surely, 2^{197111636341523} is an apocalyptic number.

197111636341523 is a deficient number, since it is larger than the sum of its proper divisors (1).

197111636341523 is an equidigital number, since it uses as much as digits as its factorization.

197111636341523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The spelling of 197111636341523 in words is "one hundred ninety-seven trillion, one hundred eleven billion, six hundred thirty-six million, three hundred forty-one thousand, five hundred twenty-three".