198345570055540 has 192 divisors, whose sum is σ = 446987948359680. Its totient is φ = 73803863992320.

The previous prime is 198345570055517. The next prime is 198345570055553. The reversal of 198345570055540 is 45550075543891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 657801331 + ... + 658102789.

It is an arithmetic number, because the mean of its divisors is an integer number (2328062231040).

Almost surely, 2^{198345570055540} is an apocalyptic number.

198345570055540 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 198345570055540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223493974179840).

198345570055540 is an abundant number, since it is smaller than the sum of its proper divisors (248642378304140).

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

198345570055540 is a wasteful number, since it uses less digits than its factorization.

198345570055540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301950 (or 301948 counting only the distinct ones).

The product of its (nonzero) digits is 75600000, while the sum is 61.

The spelling of 198345570055540 in words is "one hundred ninety-eight trillion, three hundred forty-five billion, five hundred seventy million, fifty-five thousand, five hundred forty".