199659998072 has 32 divisors (see below), whose sum is σ = 376607387520. Its totient is φ = 99231880320.

The previous prime is 199659998059. The next prime is 199659998123. The reversal of 199659998072 is 270899956991.

It is a super-2 number, since 2×199659998072² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3164498 + ... + 3226974.

It is an arithmetic number, because the mean of its divisors is an integer number (11768980860).

Almost surely, 2^199659998072 is an apocalyptic number.

It is an amenable number.

199659998072 is a deficient number, since it is larger than the sum of its proper divisors (176947389448).

199659998072 is a wasteful number, since it uses less digits than its factorization.

199659998072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64871 (or 64867 counting only the distinct ones).

The product of its (nonzero) digits is 198404640, while the sum is 74.

The spelling of 199659998072 in words is "one hundred ninety-nine billion, six hundred fifty-nine million, nine hundred ninety-eight thousand, seventy-two".