191451617311 has 2 divisors, whose sum is σ = 191451617312. Its totient is φ = 191451617310.

The previous prime is 191451617191. The next prime is 191451617323. The reversal of 191451617311 is 113716154191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191451617311 - 2⁷ = 191451617183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191451617341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95725808655 + 95725808656.

It is an arithmetic number, because the mean of its divisors is an integer number (95725808656).

Almost surely, 2^191451617311 is an apocalyptic number.

191451617311 is a deficient number, since it is larger than the sum of its proper divisors (1).

191451617311 is an equidigital number, since it uses as much as digits as its factorization.

191451617311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 40.

The spelling of 191451617311 in words is "one hundred ninety-one billion, four hundred fifty-one million, six hundred seventeen thousand, three hundred eleven".