198065905153 has 4 divisors (see below), whose sum is σ = 198066861268. Its totient is φ = 198064949040.

The previous prime is 198065905151. The next prime is 198065905187. The reversal of 198065905153 is 351509560891.

198065905153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 351509560891 = 490559 ⋅716549.

It can be written as a sum of positive squares in 2 ways, for example, as 11110846464 + 186955058689 = 105408^2 + 432383^2 .

It is a cyclic number.

It is not a de Polignac number, because 198065905153 - 2¹ = 198065905151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198065905153.

It is not an unprimeable number, because it can be changed into a prime (198065905151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22818 + ... + 629803.

It is an arithmetic number, because the mean of its divisors is an integer number (49516715317).

Almost surely, 2^198065905153 is an apocalyptic number.

It is an amenable number.

198065905153 is a deficient number, since it is larger than the sum of its proper divisors (956115).

198065905153 is an equidigital number, since it uses as much as digits as its factorization.

198065905153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956114.

The product of its (nonzero) digits is 1458000, while the sum is 52.

The spelling of 198065905153 in words is "one hundred ninety-eight billion, sixty-five million, nine hundred five thousand, one hundred fifty-three".