199801999837 has 12 divisors (see below), whose sum is σ = 219635233888. Its totient is φ = 181623162600.

The previous prime is 199801999777. The next prime is 199801999841. The reversal of 199801999837 is 738999108991.

It is not a de Polignac number, because 199801999837 - 2²⁷ = 199667782109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199801999837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199801999847) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1561168 + ... + 1684294.

Almost surely, 2^199801999837 is an apocalyptic number.

It is an amenable number.

199801999837 is a deficient number, since it is larger than the sum of its proper divisors (19833234051).

199801999837 is a wasteful number, since it uses less digits than its factorization.

199801999837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136560 (or 136549 counting only the distinct ones).

The product of its (nonzero) digits is 79361856, while the sum is 73.

The spelling of 199801999837 in words is "one hundred ninety-nine billion, eight hundred one million, nine hundred ninety-nine thousand, eight hundred thirty-seven".