4195665191 has 2 divisors, whose sum is σ = 4195665192. Its totient is φ = 4195665190.

The previous prime is 4195665181. The next prime is 4195665193. The reversal of 4195665191 is 1915665914.

4195665191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4195665191 is a prime.

It is a Sophie Germain prime.

Together with 4195665193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4195665193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2097832595 + 2097832596.

It is an arithmetic number, because the mean of its divisors is an integer number (2097832596).

Almost surely, 2^4195665191 is an apocalyptic number.

4195665191 is a deficient number, since it is larger than the sum of its proper divisors (1).

4195665191 is an equidigital number, since it uses as much as digits as its factorization.

4195665191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 291600, while the sum is 47.

The square root of 4195665191 is about 64773.9545728065. The cubic root of 4195665191 is about 1612.8733831256.

The spelling of 4195665191 in words is "four billion, one hundred ninety-five million, six hundred sixty-five thousand, one hundred ninety-one".