198383225618 has 18 divisors (see below), whose sum is σ = 304086307413. Its totient is φ = 97066665400.

The previous prime is 198383225617. The next prime is 198383225629. The reversal of 198383225618 is 816522383891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 196476768049 + 1906457569 = 443257^2 + 43663^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=314947.

It is a super-3 number, since 3×198383225618³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198383225611) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29601668 + ... + 29608368.

Almost surely, 2^198383225618 is an apocalyptic number.

198383225618 is a deficient number, since it is larger than the sum of its proper divisors (105703081795).

198383225618 is an frugal number, since it uses more digits than its factorization.

198383225618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13498 (or 6750 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 56.

The spelling of 198383225618 in words is "one hundred ninety-eight billion, three hundred eighty-three million, two hundred twenty-five thousand, six hundred eighteen".