199999069902 has 48 divisors (see below), whose sum is σ = 440825628672. Its totient is φ = 65523200400.

The previous prime is 199999069901. The next prime is 199999069909. The reversal of 199999069902 is 209960999991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199999069901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164224 + ... + 653427.

It is an arithmetic number, because the mean of its divisors is an integer number (9183867264).

Almost surely, 2^199999069902 is an apocalyptic number.

199999069902 is an abundant number, since it is smaller than the sum of its proper divisors (240826558770).

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

199999069902 is a wasteful number, since it uses less digits than its factorization.

199999069902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817893 (or 817890 counting only the distinct ones).

The product of its (nonzero) digits is 57395628, while the sum is 72.

The spelling of 199999069902 in words is "one hundred ninety-nine billion, nine hundred ninety-nine million, sixty-nine thousand, nine hundred two".