195956220277 has 2 divisors, whose sum is σ = 195956220278. Its totient is φ = 195956220276.

The previous prime is 195956220223. The next prime is 195956220319. The reversal of 195956220277 is 772022659591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156025790001 + 39930430276 = 395001^2 + 199826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195956220277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195956020277) 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, 97978110138 + 97978110139.

It is an arithmetic number, because the mean of its divisors is an integer number (97978110139).

Almost surely, 2^195956220277 is an apocalyptic number.

It is an amenable number.

195956220277 is a deficient number, since it is larger than the sum of its proper divisors (1).

195956220277 is an equidigital number, since it uses as much as digits as its factorization.

195956220277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 195956220277 in words is "one hundred ninety-five billion, nine hundred fifty-six million, two hundred twenty thousand, two hundred seventy-seven".