198619471153 has 4 divisors (see below), whose sum is σ = 198912853620. Its totient is φ = 198326088688.

The previous prime is 198619471133. The next prime is 198619471177. The reversal of 198619471153 is 351174916891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 351174916891 = 181 ⋅1940192911.

It can be written as a sum of positive squares in 2 ways, for example, as 97439495409 + 101179975744 = 312153^2 + 318088^2 .

It is a cyclic number.

It is not a de Polignac number, because 198619471153 - 2³⁷ = 61180517681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198619471094 and 198619471103.

It is not an unprimeable number, because it can be changed into a prime (198619471133) 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, 146690218 + ... + 146691571.

It is an arithmetic number, because the mean of its divisors is an integer number (49728213405).

Almost surely, 2^198619471153 is an apocalyptic number.

It is an amenable number.

198619471153 is a deficient number, since it is larger than the sum of its proper divisors (293382467).

198619471153 is an equidigital number, since it uses as much as digits as its factorization.

198619471153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293382466.

The product of its digits is 1632960, while the sum is 55.

The spelling of 198619471153 in words is "one hundred ninety-eight billion, six hundred nineteen million, four hundred seventy-one thousand, one hundred fifty-three".