199844835834 has 32 divisors (see below), whose sum is σ = 459813298176. Its totient is φ = 56720386800.

The previous prime is 199844835833. The next prime is 199844835851. The reversal of 199844835834 is 438538448991.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (199844835833) 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, 15749322 + ... + 15762005.

It is an arithmetic number, because the mean of its divisors is an integer number (14369165568).

Almost surely, 2^199844835834 is an apocalyptic number.

199844835834 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

199844835834 is an abundant number, since it is smaller than the sum of its proper divisors (259968462342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199844835834 is a wasteful number, since it uses less digits than its factorization.

199844835834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31511490.

The product of its digits is 119439360, while the sum is 66.

The spelling of 199844835834 in words is "one hundred ninety-nine billion, eight hundred forty-four million, eight hundred thirty-five thousand, eight hundred thirty-four".