199653445819 has 2 divisors, whose sum is σ = 199653445820. Its totient is φ = 199653445818.

The previous prime is 199653445741. The next prime is 199653445861. The reversal of 199653445819 is 918544356991.

It is a strong prime.

It is an emirp because it is prime and its reverse (918544356991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199653445819 - 2¹⁵ = 199653413051 is a prime.

It is a super-2 number, since 2×199653445819² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199653445619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99826722909 + 99826722910.

It is an arithmetic number, because the mean of its divisors is an integer number (99826722910).

Almost surely, 2^199653445819 is an apocalyptic number.

199653445819 is a deficient number, since it is larger than the sum of its proper divisors (1).

199653445819 is an equidigital number, since it uses as much as digits as its factorization.

199653445819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41990400, while the sum is 64.

The spelling of 199653445819 in words is "one hundred ninety-nine billion, six hundred fifty-three million, four hundred forty-five thousand, eight hundred nineteen".