198542855040 has 256 divisors, whose sum is σ = 646514058240. Its totient is φ = 51813171200.

The previous prime is 198542855023. The next prime is 198542855051. The reversal of 198542855040 is 40558245891.

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, 18670525 + ... + 18681155.

It is an arithmetic number, because the mean of its divisors is an integer number (2525445540).

Almost surely, 2^198542855040 is an apocalyptic number.

198542855040 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 198542855040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323257029120).

198542855040 is an abundant number, since it is smaller than the sum of its proper divisors (447971203200).

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

198542855040 is a wasteful number, since it uses less digits than its factorization.

198542855040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10861 (or 10849 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 51.

The spelling of 198542855040 in words is "one hundred ninety-eight billion, five hundred forty-two million, eight hundred fifty-five thousand, forty".