191525961163 has 2 divisors, whose sum is σ = 191525961164. Its totient is φ = 191525961162.

The previous prime is 191525961139. The next prime is 191525961167. The reversal of 191525961163 is 361169525191.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191525961163 - 2³³ = 182936026571 is a prime.

It is not a weakly prime, because it can be changed into another prime (191525961167) 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, 95762980581 + 95762980582.

It is an arithmetic number, because the mean of its divisors is an integer number (95762980582).

Almost surely, 2^191525961163 is an apocalyptic number.

191525961163 is a deficient number, since it is larger than the sum of its proper divisors (1).

191525961163 is an equidigital number, since it uses as much as digits as its factorization.

191525961163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 49.

The spelling of 191525961163 in words is "one hundred ninety-one billion, five hundred twenty-five million, nine hundred sixty-one thousand, one hundred sixty-three".