199439208804 has 144 divisors (see below), whose sum is σ = 534202139520. Its totient is φ = 57759398400.

The previous prime is 199439208791. The next prime is 199439208851. The reversal of 199439208804 is 408802934991.

It is a super-2 number, since 2×199439208804² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62148352 + ... + 62151560.

It is an arithmetic number, because the mean of its divisors is an integer number (3709737080).

Almost surely, 2^199439208804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199439208804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267101069760).

199439208804 is an abundant number, since it is smaller than the sum of its proper divisors (334762930716).

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

199439208804 is a wasteful number, since it uses less digits than its factorization.

199439208804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122 (or 5109 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The spelling of 199439208804 in words is "one hundred ninety-nine billion, four hundred thirty-nine million, two hundred eight thousand, eight hundred four".