191009811163 has 2 divisors, whose sum is σ = 191009811164. Its totient is φ = 191009811162.

The previous prime is 191009811073. The next prime is 191009811211. The reversal of 191009811163 is 361118900191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191009811163 - 2³³ = 182419876571 is a prime.

It is not a weakly prime, because it can be changed into another prime (191009811463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95504905581 + 95504905582.

It is an arithmetic number, because the mean of its divisors is an integer number (95504905582).

Almost surely, 2^191009811163 is an apocalyptic number.

191009811163 is a deficient number, since it is larger than the sum of its proper divisors (1).

191009811163 is an equidigital number, since it uses as much as digits as its factorization.

191009811163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 191009811163 in words is "one hundred ninety-one billion, nine million, eight hundred eleven thousand, one hundred sixty-three".