198772556 has 24 divisors (see below), whose sum is σ = 351540000. Its totient is φ = 98338304.

The previous prime is 198772549. The next prime is 198772559. The reversal of 198772556 is 655277891.

198772556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (198772559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213500 + ... + 214428.

It is an arithmetic number, because the mean of its divisors is an integer number (14647500).

Almost surely, 2^198772556 is an apocalyptic number.

It is an amenable number.

198772556 is a deficient number, since it is larger than the sum of its proper divisors (152767444).

198772556 is a wasteful number, since it uses less digits than its factorization.

198772556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441 (or 1439 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 50.

The square root of 198772556 is about 14098.6721360559. The cubic root of 198772556 is about 583.6047358207.

The spelling of 198772556 in words is "one hundred ninety-eight million, seven hundred seventy-two thousand, five hundred fifty-six".