198207026688 has 160 divisors (see below), whose sum is σ = 609924712320. Its totient is φ = 56529551360.

The previous prime is 198207026663. The next prime is 198207026723. The reversal of 198207026688 is 886620702891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57798 + ... + 632261.

It is an arithmetic number, because the mean of its divisors is an integer number (3812029452).

Almost surely, 2^198207026688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198207026688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304962356160).

198207026688 is an abundant number, since it is smaller than the sum of its proper divisors (411717685632).

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

198207026688 is a wasteful number, since it uses less digits than its factorization.

198207026688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690108 (or 690092 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 198207026688 in words is "one hundred ninety-eight billion, two hundred seven million, twenty-six thousand, six hundred eighty-eight".