198438175356 has 24 divisors (see below), whose sum is σ = 463036200144. Its totient is φ = 66144088320.

The previous prime is 198438175289. The next prime is 198438175357. The reversal of 198438175356 is 653571834891.

198438175356 = 148484² + 148485² + ... + 148492².

It is a self number, because there is not a number n which added to its sum of digits gives 198438175356.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198438175357) 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, 206746 + ... + 663038.

It is an arithmetic number, because the mean of its divisors is an integer number (19293175006).

Almost surely, 2^198438175356 is an apocalyptic number.

It is an amenable number.

198438175356 is an abundant number, since it is smaller than the sum of its proper divisors (264598024788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198438175356 is a wasteful number, since it uses less digits than its factorization.

198438175356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492541 (or 492539 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 60.

Subtracting from 198438175356 its sum of digits (60), we obtain a square (198438175296 = 445464²).

The spelling of 198438175356 in words is "one hundred ninety-eight billion, four hundred thirty-eight million, one hundred seventy-five thousand, three hundred fifty-six".