196561542323 has 2 divisors, whose sum is σ = 196561542324. Its totient is φ = 196561542322.

The previous prime is 196561542311. The next prime is 196561542349. The reversal of 196561542323 is 323245165691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196561542323 - 2¹⁰ = 196561541299 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (196561542523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98280771161 + 98280771162.

It is an arithmetic number, because the mean of its divisors is an integer number (98280771162).

Almost surely, 2^196561542323 is an apocalyptic number.

196561542323 is a deficient number, since it is larger than the sum of its proper divisors (1).

196561542323 is an equidigital number, since it uses as much as digits as its factorization.

196561542323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 47.

The spelling of 196561542323 in words is "one hundred ninety-six billion, five hundred sixty-one million, five hundred forty-two thousand, three hundred twenty-three".