191591463113 has 2 divisors, whose sum is σ = 191591463114. Its totient is φ = 191591463112.

The previous prime is 191591463067. The next prime is 191591463163. The reversal of 191591463113 is 311364195191.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114767145529 + 76824317584 = 338773^2 + 277172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191591463113 is a prime.

It is not a weakly prime, because it can be changed into another prime (191591463163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95795731556 + 95795731557.

It is an arithmetic number, because the mean of its divisors is an integer number (95795731557).

Almost surely, 2^191591463113 is an apocalyptic number.

It is an amenable number.

191591463113 is a deficient number, since it is larger than the sum of its proper divisors (1).

191591463113 is an equidigital number, since it uses as much as digits as its factorization.

191591463113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 44.

The spelling of 191591463113 in words is "one hundred ninety-one billion, five hundred ninety-one million, four hundred sixty-three thousand, one hundred thirteen".