133681608091 has 2 divisors, whose sum is σ = 133681608092. Its totient is φ = 133681608090.

The previous prime is 133681608083. The next prime is 133681608133. The reversal of 133681608091 is 190806186331.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (190806186331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133681608091 - 2³ = 133681608083 is a prime.

It is not a weakly prime, because it can be changed into another prime (133681608001) 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, 66840804045 + 66840804046.

It is an arithmetic number, because the mean of its divisors is an integer number (66840804046).

Almost surely, 2^133681608091 is an apocalyptic number.

133681608091 is a deficient number, since it is larger than the sum of its proper divisors (1).

133681608091 is an equidigital number, since it uses as much as digits as its factorization.

133681608091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 133681608091 in words is "one hundred thirty-three billion, six hundred eighty-one million, six hundred eight thousand, ninety-one".