198055641 has 8 divisors (see below), whose sum is σ = 301799104. Its totient is φ = 113174640.

The previous prime is 198055619. The next prime is 198055651. The reversal of 198055641 is 146550891.

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

It is not a de Polignac number, because 198055641 - 2⁹ = 198055129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 198055641.

It is not an unprimeable number, because it can be changed into a prime (198055651) 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, 4715590 + ... + 4715631.

It is an arithmetic number, because the mean of its divisors is an integer number (37724888).

Almost surely, 2^198055641 is an apocalyptic number.

It is an amenable number.

198055641 is a deficient number, since it is larger than the sum of its proper divisors (103743463).

198055641 is an equidigital number, since it uses as much as digits as its factorization.

198055641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9431231.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 198055641 is about 14073.2242574330. The cubic root of 198055641 is about 582.9022595538.

The spelling of 198055641 in words is "one hundred ninety-eight million, fifty-five thousand, six hundred forty-one".