199518680 has 16 divisors (see below), whose sum is σ = 448917120. Its totient is φ = 79807456.

The previous prime is 199518661. The next prime is 199518691. The reversal of 199518680 is 86815991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2493944 + ... + 2494023.

It is an arithmetic number, because the mean of its divisors is an integer number (28057320).

Almost surely, 2^199518680 is an apocalyptic number.

199518680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199518680 is an abundant number, since it is smaller than the sum of its proper divisors (249398440).

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

199518680 is a wasteful number, since it uses less digits than its factorization.

199518680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4987978 (or 4987974 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 47.

The square root of 199518680 is about 14125.1081411790. The cubic root of 199518680 is about 584.3340413971.

The spelling of 199518680 in words is "one hundred ninety-nine million, five hundred eighteen thousand, six hundred eighty".