198448890256 has 80 divisors (see below), whose sum is σ = 396909037168. Its totient is φ = 96082329600.

The previous prime is 198448890221. The next prime is 198448890259. The reversal of 198448890256 is 652098844891.

It can be written as a sum of positive squares in 8 ways, for example, as 48435206400 + 150013683856 = 220080^2 + 387316^2 .

It is not an unprimeable number, because it can be changed into a prime (198448890259) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18266266 + ... + 18277126.

Almost surely, 2^198448890256 is an apocalyptic number.

198448890256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198448890256 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

198448890256 is a wasteful number, since it uses less digits than its factorization.

198448890256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11220 (or 11214 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 64.

The spelling of 198448890256 in words is "one hundred ninety-eight billion, four hundred forty-eight million, eight hundred ninety thousand, two hundred fifty-six".