198259515388 has 24 divisors (see below), whose sum is σ = 378507270960. Its totient is φ = 90115144320.

The previous prime is 198259515341. The next prime is 198259515481. The reversal of 198259515388 is 883515952891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114920 + ... + 2206672.

It is an arithmetic number, because the mean of its divisors is an integer number (15771136290).

Almost surely, 2^198259515388 is an apocalyptic number.

It is an amenable number.

198259515388 is a deficient number, since it is larger than the sum of its proper divisors (180247755572).

198259515388 is a wasteful number, since it uses less digits than its factorization.

198259515388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140877 (or 140875 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 64.

The spelling of 198259515388 in words is "one hundred ninety-eight billion, two hundred fifty-nine million, five hundred fifteen thousand, three hundred eighty-eight".