198633449448 has 80 divisors (see below), whose sum is σ = 635837246880. Its totient is φ = 56752412832.

The previous prime is 198633449447. The next prime is 198633449473. The reversal of 198633449448 is 844944336891.

It is a happy number.

198633449448 is a `hidden beast` number, since 1 + 98 + 63 + 3 + 4 + 49 + 448 = 666.

It is a super-2 number, since 2×198633449448² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (198633449447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21890686 + ... + 21899757.

It is an arithmetic number, because the mean of its divisors is an integer number (7947965586).

Almost surely, 2^198633449448 is an apocalyptic number.

198633449448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

198633449448 is an abundant number, since it is smaller than the sum of its proper divisors (437203797432).

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

198633449448 is a wasteful number, since it uses less digits than its factorization.

198633449448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43790468 (or 43790455 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 63.

The spelling of 198633449448 in words is "one hundred ninety-eight billion, six hundred thirty-three million, four hundred forty-nine thousand, four hundred forty-eight".