198320626980 has 288 divisors, whose sum is σ = 715295293440. Its totient is φ = 43521649920.

The previous prime is 198320626979. The next prime is 198320627009. The reversal of 198320626980 is 89626023891.

198320626980 is a `hidden beast` number, since 1 + 9 + 8 + 3 + 2 + 0 + 626 + 9 + 8 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4940631 + ... + 4980609.

Almost surely, 2^198320626980 is an apocalyptic number.

198320626980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198320626980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357647646720).

198320626980 is an abundant number, since it is smaller than the sum of its proper divisors (516974666460).

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

198320626980 is a wasteful number, since it uses less digits than its factorization.

198320626980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40159 (or 40154 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 198320626980 in words is "one hundred ninety-eight billion, three hundred twenty million, six hundred twenty-six thousand, nine hundred eighty".