199043094854 has 4 divisors (see below), whose sum is σ = 298564642284. Its totient is φ = 99521547426.

The previous prime is 199043094847. The next prime is 199043094857. The reversal of 199043094854 is 458490340991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 458490340991 = 229963 ⋅1993757.

It is a self number, because there is not a number n which added to its sum of digits gives 199043094854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199043094857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49760773712 + ... + 49760773715.

It is an arithmetic number, because the mean of its divisors is an integer number (74641160571).

Almost surely, 2^199043094854 is an apocalyptic number.

199043094854 is a deficient number, since it is larger than the sum of its proper divisors (99521547430).

199043094854 is an equidigital number, since it uses as much as digits as its factorization.

199043094854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99521547429.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 199043094854 in words is "one hundred ninety-nine billion, forty-three million, ninety-four thousand, eight hundred fifty-four".