198742998161 has 8 divisors (see below), whose sum is σ = 199779089664. Its totient is φ = 197708200560.

The previous prime is 198742998101. The next prime is 198742998169. The reversal of 198742998161 is 161899247891.

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

It is a cyclic number.

It is not a de Polignac number, because 198742998161 - 2¹⁴ = 198742981777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198742998169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14711 + ... + 630636.

It is an arithmetic number, because the mean of its divisors is an integer number (24972386208).

Almost surely, 2^198742998161 is an apocalyptic number.

It is an amenable number.

198742998161 is a deficient number, since it is larger than the sum of its proper divisors (1036091503).

198742998161 is a wasteful number, since it uses less digits than its factorization.

198742998161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646951.

The product of its digits is 15676416, while the sum is 65.

The spelling of 198742998161 in words is "one hundred ninety-eight billion, seven hundred forty-two million, nine hundred ninety-eight thousand, one hundred sixty-one".