198756564 has 12 divisors (see below), whose sum is σ = 463765344. Its totient is φ = 66252184.

The previous prime is 198756541. The next prime is 198756577. The reversal of 198756564 is 465657891.

198756564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8281512 + ... + 8281535.

It is an arithmetic number, because the mean of its divisors is an integer number (38647112).

Almost surely, 2^198756564 is an apocalyptic number.

It is an amenable number.

198756564 is an abundant number, since it is smaller than the sum of its proper divisors (265008780).

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

198756564 is a wasteful number, since it uses less digits than its factorization.

198756564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16563054 (or 16563052 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The square root of 198756564 is about 14098.1049790388. The cubic root of 198756564 is about 583.5890843354.

The spelling of 198756564 in words is "one hundred ninety-eight million, seven hundred fifty-six thousand, five hundred sixty-four".