198774523008 has 192 divisors, whose sum is σ = 582465124800. Its totient is φ = 65048315904.

The previous prime is 198774522979. The next prime is 198774523009. The reversal of 198774523008 is 800325477891.

It is a happy number.

198774523008 is a `hidden beast` number, since 1 + 98 + 77 + 452 + 30 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×198774523008² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198774523009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68850141 + ... + 68853027.

It is an arithmetic number, because the mean of its divisors is an integer number (3033672525).

Almost surely, 2^198774523008 is an apocalyptic number.

198774523008 is a gapful number since it is divisible by the number (18) 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 198774523008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291232562400).

198774523008 is an abundant number, since it is smaller than the sum of its proper divisors (383690601792).

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

198774523008 is a wasteful number, since it uses less digits than its factorization.

198774523008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979 (or 3964 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 198774523008 in words is "one hundred ninety-eight billion, seven hundred seventy-four million, five hundred twenty-three thousand, eight".