199122678434 has 32 divisors (see below), whose sum is σ = 312786714240. Its totient is φ = 94891813632.

The previous prime is 199122678353. The next prime is 199122678437. The reversal of 199122678434 is 434876221991.

It is a happy number.

199122678434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 199122678434.

It is not an unprimeable number, because it can be changed into a prime (199122678437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35791337 + ... + 35796899.

It is an arithmetic number, because the mean of its divisors is an integer number (9774584820).

Almost surely, 2^199122678434 is an apocalyptic number.

199122678434 is a deficient number, since it is larger than the sum of its proper divisors (113664035806).

199122678434 is a wasteful number, since it uses less digits than its factorization.

199122678434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8234.

The product of its digits is 5225472, while the sum is 56.

The spelling of 199122678434 in words is "one hundred ninety-nine billion, one hundred twenty-two million, six hundred seventy-eight thousand, four hundred thirty-four".