199661846694 has 16 divisors (see below), whose sum is σ = 404134823232. Its totient is φ = 65752093928.

The previous prime is 199661846689. The next prime is 199661846707. The reversal of 199661846694 is 496648166991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200463204 + ... + 200464199.

It is an arithmetic number, because the mean of its divisors is an integer number (25258426452).

Almost surely, 2^199661846694 is an apocalyptic number.

199661846694 is an abundant number, since it is smaller than the sum of its proper divisors (204472976538).

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

199661846694 is a wasteful number, since it uses less digits than its factorization.

199661846694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400927491.

The product of its digits is 120932352, while the sum is 69.

The spelling of 199661846694 in words is "one hundred ninety-nine billion, six hundred sixty-one million, eight hundred forty-six thousand, six hundred ninety-four".