198163656 has 96 divisors (see below), whose sum is σ = 566092800. Its totient is φ = 62530560.

The previous prime is 198163649. The next prime is 198163681. The reversal of 198163656 is 656361891.

198163656 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 636 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103960 + ... + 105848.

It is an arithmetic number, because the mean of its divisors is an integer number (5896800).

Almost surely, 2^198163656 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 198163656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283046400).

198163656 is an abundant number, since it is smaller than the sum of its proper divisors (367929144).

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

198163656 is a wasteful number, since it uses less digits than its factorization.

198163656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979 (or 1972 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 198163656 is about 14077.0613410612. The cubic root of 198163656 is about 583.0082074659.

The spelling of 198163656 in words is "one hundred ninety-eight million, one hundred sixty-three thousand, six hundred fifty-six".