191457312619 has 2 divisors, whose sum is σ = 191457312620. Its totient is φ = 191457312618.

The previous prime is 191457312589. The next prime is 191457312647. The reversal of 191457312619 is 916213754191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191457312619 - 2¹¹ = 191457310571 is a prime.

It is a super-2 number, since 2×191457312619² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191457312659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95728656309 + 95728656310.

It is an arithmetic number, because the mean of its divisors is an integer number (95728656310).

Almost surely, 2^191457312619 is an apocalyptic number.

191457312619 is a deficient number, since it is larger than the sum of its proper divisors (1).

191457312619 is an equidigital number, since it uses as much as digits as its factorization.

191457312619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 49.

The spelling of 191457312619 in words is "one hundred ninety-one billion, four hundred fifty-seven million, three hundred twelve thousand, six hundred nineteen".