194066990208 has 640 divisors, whose sum is σ = 718079281920. Its totient is φ = 50660204544.

The previous prime is 194066990189. The next prime is 194066990251. The reversal of 194066990208 is 802099660491.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 97178266 + ... + 97180262.

It is an arithmetic number, because the mean of its divisors is an integer number (1121998878).

Almost surely, 2^194066990208 is an apocalyptic number.

194066990208 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 194066990208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359039640960).

194066990208 is an abundant number, since it is smaller than the sum of its proper divisors (524012291712).

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

194066990208 is a wasteful number, since it uses less digits than its factorization.

194066990208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 2125 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 194066990208 in words is "one hundred ninety-four billion, sixty-six million, nine hundred ninety thousand, two hundred eight".