198638647233 has 32 divisors (see below), whose sum is σ = 287008081920. Its totient is φ = 121476989760.

The previous prime is 198638647231. The next prime is 198638647237. The reversal of 198638647233 is 332746836891.

It is not a de Polignac number, because 198638647233 - 2¹ = 198638647231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198638647231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4554910 + ... + 4598312.

It is an arithmetic number, because the mean of its divisors is an integer number (8969002560).

Almost surely, 2^198638647233 is an apocalyptic number.

198638647233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

198638647233 is a deficient number, since it is larger than the sum of its proper divisors (88369434687).

198638647233 is a wasteful number, since it uses less digits than its factorization.

198638647233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44149.

The product of its digits is 31352832, while the sum is 60.

The spelling of 198638647233 in words is "one hundred ninety-eight billion, six hundred thirty-eight million, six hundred forty-seven thousand, two hundred thirty-three".