135617220191 has 2 divisors, whose sum is σ = 135617220192. Its totient is φ = 135617220190.

The previous prime is 135617220187. The next prime is 135617220257. The reversal of 135617220191 is 191022716531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135617220191 - 2² = 135617220187 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135617226191) 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, 67808610095 + 67808610096.

It is an arithmetic number, because the mean of its divisors is an integer number (67808610096).

Almost surely, 2^135617220191 is an apocalyptic number.

135617220191 is a deficient number, since it is larger than the sum of its proper divisors (1).

135617220191 is an equidigital number, since it uses as much as digits as its factorization.

135617220191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The spelling of 135617220191 in words is "one hundred thirty-five billion, six hundred seventeen million, two hundred twenty thousand, one hundred ninety-one".