198055556 has 12 divisors (see below), whose sum is σ = 353971968. Its totient is φ = 96920712.

The previous prime is 198055547. The next prime is 198055579. The reversal of 198055556 is 655550891.

198055556 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

198055556 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526556 + ... + 526931.

It is an arithmetic number, because the mean of its divisors is an integer number (29497664).

Almost surely, 2^198055556 is an apocalyptic number.

It is an amenable number.

198055556 is a deficient number, since it is larger than the sum of its proper divisors (155916412).

198055556 is a wasteful number, since it uses less digits than its factorization.

198055556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053538 (or 1053536 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 44.

The square root of 198055556 is about 14073.2212375135. The cubic root of 198055556 is about 582.9021761652.

The spelling of 198055556 in words is "one hundred ninety-eight million, fifty-five thousand, five hundred fifty-six".