198489425815 has 32 divisors (see below), whose sum is σ = 251902909440. Its totient is φ = 149727916800.

The previous prime is 198489425807. The next prime is 198489425821. The reversal of 198489425815 is 518524984891.

It is not a de Polignac number, because 198489425815 - 2³ = 198489425807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21474595 + ... + 21483835.

It is an arithmetic number, because the mean of its divisors is an integer number (7871965920).

Almost surely, 2^198489425815 is an apocalyptic number.

198489425815 is a deficient number, since it is larger than the sum of its proper divisors (53413483625).

198489425815 is a wasteful number, since it uses less digits than its factorization.

198489425815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10303.

The product of its digits is 33177600, while the sum is 64.

The spelling of 198489425815 in words is "one hundred ninety-eight billion, four hundred eighty-nine million, four hundred twenty-five thousand, eight hundred fifteen".