198541449039648 has 384 divisors, whose sum is σ = 613048372763904. Its totient is φ = 55466901504000.

The previous prime is 198541449039643. The next prime is 198541449039667. The reversal of 198541449039648 is 846930944145891.

It is a self number, because there is not a number n which added to its sum of digits gives 198541449039648.

It is not an unprimeable number, because it can be changed into a prime (198541449039643) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70882343848 + ... + 70882346648.

It is an arithmetic number, because the mean of its divisors is an integer number (1596480137406).

Almost surely, 2^{198541449039648} 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 198541449039648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306524186381952).

198541449039648 is an abundant number, since it is smaller than the sum of its proper divisors (414506923724256).

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

198541449039648 is a wasteful number, since it uses less digits than its factorization.

198541449039648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428 (or 7420 counting only the distinct ones).

The product of its (nonzero) digits is 1074954240, while the sum is 75.

The spelling of 198541449039648 in words is "one hundred ninety-eight trillion, five hundred forty-one billion, four hundred forty-nine million, thirty-nine thousand, six hundred forty-eight".