199661882871168 has 224 divisors, whose sum is σ = 610918741931400. Its totient is φ = 64930692372480.

The previous prime is 199661882871133. The next prime is 199661882871173. The reversal of 199661882871168 is 861178288166991.

199661882871168 is a `hidden beast` number, since 1 + 9 + 96 + 6 + 188 + 287 + 11 + 68 = 666.

199661882871168 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 22268398 + ... + 29919981.

Almost surely, 2^{199661882871168} is an apocalyptic number.

199661882871168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

199661882871168 is an abundant number, since it is smaller than the sum of its proper divisors (411256859060232).

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

199661882871168 is an frugal number, since it uses more digits than its factorization.

199661882871168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52188452 (or 52188425 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 81.

The spelling of 199661882871168 in words is "one hundred ninety-nine trillion, six hundred sixty-one billion, eight hundred eighty-two million, eight hundred seventy-one thousand, one hundred sixty-eight".