198072038739 has 4 divisors (see below), whose sum is σ = 264096051656. Its totient is φ = 132048025824.

The previous prime is 198072038699. The next prime is 198072038753. The reversal of 198072038739 is 937830270891.

198072038739 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.

It is not a de Polignac number, because 198072038739 - 2¹⁹ = 198071514451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198072038789) 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, 33012006454 + ... + 33012006459.

It is an arithmetic number, because the mean of its divisors is an integer number (66024012914).

Almost surely, 2^198072038739 is an apocalyptic number.

198072038739 is a deficient number, since it is larger than the sum of its proper divisors (66024012917).

198072038739 is an equidigital number, since it uses as much as digits as its factorization.

198072038739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66024012916.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The spelling of 198072038739 in words is "one hundred ninety-eight billion, seventy-two million, thirty-eight thousand, seven hundred thirty-nine".