199219454819 has 16 divisors (see below), whose sum is σ = 248390753280. Its totient is φ = 155227656960.

The previous prime is 199219454809. The next prime is 199219454827. The reversal of 199219454819 is 918454912991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199219454819 is a prime.

It is a super-2 number, since 2×199219454819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199219454809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1664582 + ... + 1780244.

It is an arithmetic number, because the mean of its divisors is an integer number (15524422080).

Almost surely, 2^199219454819 is an apocalyptic number.

199219454819 is a deficient number, since it is larger than the sum of its proper divisors (49171298461).

199219454819 is a wasteful number, since it uses less digits than its factorization.

199219454819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138050.

The product of its digits is 8398080, while the sum is 62.

The spelling of 199219454819 in words is "one hundred ninety-nine billion, two hundred nineteen million, four hundred fifty-four thousand, eight hundred nineteen".