196268278649 has 2 divisors, whose sum is σ = 196268278650. Its totient is φ = 196268278648.

The previous prime is 196268278621. The next prime is 196268278673. The reversal of 196268278649 is 946872862691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127816975225 + 68451303424 = 357515^2 + 261632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196268278649 is a prime.

It is not a weakly prime, because it can be changed into another prime (196268278949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98134139324 + 98134139325.

It is an arithmetic number, because the mean of its divisors is an integer number (98134139325).

Almost surely, 2^196268278649 is an apocalyptic number.

It is an amenable number.

196268278649 is a deficient number, since it is larger than the sum of its proper divisors (1).

196268278649 is an equidigital number, since it uses as much as digits as its factorization.

196268278649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125411328, while the sum is 68.

The spelling of 196268278649 in words is "one hundred ninety-six billion, two hundred sixty-eight million, two hundred seventy-eight thousand, six hundred forty-nine".