198049522242 has 128 divisors (see below), whose sum is σ = 472332655872. Its totient is φ = 54568857600.

The previous prime is 198049522241. The next prime is 198049522243. The reversal of 198049522242 is 242225940891.

It is an interprime number because it is at equal distance from previous prime (198049522241) and next prime (198049522243).

It is a super-2 number, since 2×198049522242² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198049522191 and 198049522200.

It is not an unprimeable number, because it can be changed into a prime (198049522241) 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, 64699392 + ... + 64702452.

It is an arithmetic number, because the mean of its divisors is an integer number (3690098874).

Almost surely, 2^198049522242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198049522242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236166327936).

198049522242 is an abundant number, since it is smaller than the sum of its proper divisors (274283133630).

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

198049522242 is a wasteful number, since it uses less digits than its factorization.

198049522242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 198049522242 in words is "one hundred ninety-eight billion, forty-nine million, five hundred twenty-two thousand, two hundred forty-two".