198533671247 has 4 divisors (see below), whose sum is σ = 199357462656. Its totient is φ = 197709879840.

The previous prime is 198533671243. The next prime is 198533671249. The reversal of 198533671247 is 742176335891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198533671247 - 2² = 198533671243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198533671192 and 198533671201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198533671243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411895343 + ... + 411895824.

It is an arithmetic number, because the mean of its divisors is an integer number (49839365664).

Almost surely, 2^198533671247 is an apocalyptic number.

198533671247 is a deficient number, since it is larger than the sum of its proper divisors (823791409).

198533671247 is an equidigital number, since it uses as much as digits as its factorization.

198533671247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823791408.

The product of its digits is 7620480, while the sum is 56.

The spelling of 198533671247 in words is "one hundred ninety-eight billion, five hundred thirty-three million, six hundred seventy-one thousand, two hundred forty-seven".