196126951081 has 2 divisors, whose sum is σ = 196126951082. Its totient is φ = 196126951080.

The previous prime is 196126951073. The next prime is 196126951121. The reversal of 196126951081 is 180159621691.

It is a happy number.

196126951081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153808289856 + 42318661225 = 392184^2 + 205715^2 .

It is a cyclic number.

It is not a de Polignac number, because 196126951081 - 2³ = 196126951073 is a prime.

It is a super-2 number, since 2×196126951081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (196126951021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98063475540 + 98063475541.

It is an arithmetic number, because the mean of its divisors is an integer number (98063475541).

Almost surely, 2^196126951081 is an apocalyptic number.

It is an amenable number.

196126951081 is a deficient number, since it is larger than the sum of its proper divisors (1).

196126951081 is an equidigital number, since it uses as much as digits as its factorization.

196126951081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 49.

The spelling of 196126951081 in words is "one hundred ninety-six billion, one hundred twenty-six million, nine hundred fifty-one thousand, eighty-one".