198125502500 has 30 divisors (see below), whose sum is σ = 433260854334. Its totient is φ = 79250200000.

The previous prime is 198125502439. The next prime is 198125502521. The reversal of 198125502500 is 5205521891.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 30348427264 + 167777075236 = 174208^2 + 409606^2 .

It is a super-3 number, since 3×198125502500³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39622601 + ... + 39627600.

Almost surely, 2^198125502500 is an apocalyptic number.

198125502500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198125502500 is an abundant number, since it is smaller than the sum of its proper divisors (235135351834).

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

198125502500 is an equidigital number, since it uses as much as digits as its factorization.

198125502500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79250225 (or 79250208 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 198125502500 in words is "one hundred ninety-eight billion, one hundred twenty-five million, five hundred two thousand, five hundred".