198383639616 has 70 divisors (see below), whose sum is σ = 588071271150. Its totient is φ = 66127878144.

The previous prime is 198383639579. The next prime is 198383639621. The reversal of 198383639616 is 616936383891.

198383639616 is a `hidden beast` number, since 1 + 9 + 8 + 3 + 8 + 3 + 6 + 3 + 9 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 140553009216 + 57830630400 = 374904^2 + 240480^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19129041 + ... + 19139408.

Almost surely, 2^198383639616 is an apocalyptic number.

198383639616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

198383639616 is an abundant number, since it is smaller than the sum of its proper divisors (389687631534).

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

198383639616 is an equidigital number, since it uses as much as digits as its factorization.

198383639616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38268473 (or 38268454 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The spelling of 198383639616 in words is "one hundred ninety-eight billion, three hundred eighty-three million, six hundred thirty-nine thousand, six hundred sixteen".