199668648108 has 48 divisors (see below), whose sum is σ = 471301449696. Its totient is φ = 65785881600.

The previous prime is 199668648079. The next prime is 199668648139. The reversal of 199668648108 is 801846866991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579810 + ... + 857622.

It is an arithmetic number, because the mean of its divisors is an integer number (9818780202).

Almost surely, 2^199668648108 is an apocalyptic number.

It is an amenable number.

199668648108 is an abundant number, since it is smaller than the sum of its proper divisors (271632801588).

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

199668648108 is a wasteful number, since it uses less digits than its factorization.

199668648108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278514 (or 278512 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 66.

The spelling of 199668648108 in words is "one hundred ninety-nine billion, six hundred sixty-eight million, six hundred forty-eight thousand, one hundred eight".