199996000000 has 126 divisors (see below), whose sum is σ = 499017050000. Its totient is φ = 79996800000.

The previous prime is 199995999991. The next prime is 199996000019. The reversal of 199996000000 is 699991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 3975001 + ... + 4024999.

Almost surely, 2^199996000000 is an apocalyptic number.

199996000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199996000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249508525000).

199996000000 is an abundant number, since it is smaller than the sum of its proper divisors (299021050000).

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

199996000000 is an frugal number, since it uses more digits than its factorization.

199996000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50045 (or 50006 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 43.

Adding to 199996000000 its reverse (699991), we get a palindrome (199996699991).

The spelling of 199996000000 in words is "one hundred ninety-nine billion, nine hundred ninety-six million", and thus it is an aban number.