198498901985 has 8 divisors (see below), whose sum is σ = 238964596416. Its totient is φ = 158288512240.

The previous prime is 198498901961. The next prime is 198498901999. The reversal of 198498901985 is 589109894891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198498901985 - 2¹⁶ = 198498836449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63824459 + ... + 63827568.

It is an arithmetic number, because the mean of its divisors is an integer number (29870574552).

Almost surely, 2^198498901985 is an apocalyptic number.

It is an amenable number.

198498901985 is a deficient number, since it is larger than the sum of its proper divisors (40465694431).

198498901985 is a wasteful number, since it uses less digits than its factorization.

198498901985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127652343.

The product of its (nonzero) digits is 67184640, while the sum is 71.

The spelling of 198498901985 in words is "one hundred ninety-eight billion, four hundred ninety-eight million, nine hundred one thousand, nine hundred eighty-five".