191959105607 has 2 divisors, whose sum is σ = 191959105608. Its totient is φ = 191959105606.

The previous prime is 191959105571. The next prime is 191959105619. The reversal of 191959105607 is 706501959191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191959105607 - 2⁶ = 191959105543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191959105697) 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, 95979552803 + 95979552804.

It is an arithmetic number, because the mean of its divisors is an integer number (95979552804).

Almost surely, 2^191959105607 is an apocalyptic number.

191959105607 is a deficient number, since it is larger than the sum of its proper divisors (1).

191959105607 is an equidigital number, since it uses as much as digits as its factorization.

191959105607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 765450, while the sum is 53.

The spelling of 191959105607 in words is "one hundred ninety-one billion, nine hundred fifty-nine million, one hundred five thousand, six hundred seven".