198564512 has 24 divisors (see below), whose sum is σ = 393786036. Its totient is φ = 98555392.

The previous prime is 198564511. The next prime is 198564523. The reversal of 198564512 is 215465891.

It can be written as a sum of positive squares in 2 ways, for example, as 195888016 + 2676496 = 13996^2 + 1636^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 198564512.

It is not an unprimeable number, because it can be changed into a prime (198564511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18263 + ... + 27030.

Almost surely, 2^198564512 is an apocalyptic number.

It is an amenable number.

198564512 is a deficient number, since it is larger than the sum of its proper divisors (195221524).

198564512 is a wasteful number, since it uses less digits than its factorization.

198564512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45440 (or 45432 counting only the distinct ones).

The product of its digits is 86400, while the sum is 41.

The square root of 198564512 is about 14091.2920628309. The cubic root of 198564512 is about 583.4010560467.

The spelling of 198564512 in words is "one hundred ninety-eight million, five hundred sixty-four thousand, five hundred twelve".