196942851841 has 2 divisors, whose sum is σ = 196942851842. Its totient is φ = 196942851840.

The previous prime is 196942851779. The next prime is 196942851887. The reversal of 196942851841 is 148158249691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147260225025 + 49682626816 = 383745^2 + 222896^2 .

It is an emirp because it is prime and its reverse (148158249691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196942851841 - 2⁷ = 196942851713 is a prime.

It is not a weakly prime, because it can be changed into another prime (196942854841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98471425920 + 98471425921.

It is an arithmetic number, because the mean of its divisors is an integer number (98471425921).

Almost surely, 2^196942851841 is an apocalyptic number.

It is an amenable number.

196942851841 is a deficient number, since it is larger than the sum of its proper divisors (1).

196942851841 is an equidigital number, since it uses as much as digits as its factorization.

196942851841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 58.

The spelling of 196942851841 in words is "one hundred ninety-six billion, nine hundred forty-two million, eight hundred fifty-one thousand, eight hundred forty-one".