191017632433 has 2 divisors, whose sum is σ = 191017632434. Its totient is φ = 191017632432.

The previous prime is 191017632427. The next prime is 191017632439. The reversal of 191017632433 is 334236710191.

It is a balanced prime because it is at equal distance from previous prime (191017632427) and next prime (191017632439).

It can be written as a sum of positive squares in only one way, i.e., 138021909169 + 52995723264 = 371513^2 + 230208^2 .

It is a cyclic number.

It is not a de Polignac number, because 191017632433 - 2⁵ = 191017632401 is a prime.

It is not a weakly prime, because it can be changed into another prime (191017632439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95508816216 + 95508816217.

It is an arithmetic number, because the mean of its divisors is an integer number (95508816217).

Almost surely, 2^191017632433 is an apocalyptic number.

It is an amenable number.

191017632433 is a deficient number, since it is larger than the sum of its proper divisors (1).

191017632433 is an equidigital number, since it uses as much as digits as its factorization.

191017632433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 191017632433 in words is "one hundred ninety-one billion, seventeen million, six hundred thirty-two thousand, four hundred thirty-three".