191414018078819 has 2 divisors, whose sum is σ = 191414018078820. Its totient is φ = 191414018078818.

The previous prime is 191414018078809. The next prime is 191414018078821. The reversal of 191414018078819 is 918870810414191.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191414018078819 is a prime.

It is a super-2 number, since 2×191414018078819² (a number of 29 digits) contains 22 as substring.

Together with 191414018078821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191414018078809) 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, 95707009039409 + 95707009039410.

It is an arithmetic number, because the mean of its divisors is an integer number (95707009039410).

Almost surely, 2^{191414018078819} is an apocalyptic number.

191414018078819 is a deficient number, since it is larger than the sum of its proper divisors (1).

191414018078819 is an equidigital number, since it uses as much as digits as its factorization.

191414018078819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4644864, while the sum is 62.

The spelling of 191414018078819 in words is "one hundred ninety-one trillion, four hundred fourteen billion, eighteen million, seventy-eight thousand, eight hundred nineteen".