194609383938 has 18 divisors (see below), whose sum is σ = 421657720419. Its totient is φ = 64869170772.

The previous prime is 194609383937. The next prime is 194609383987. The reversal of 194609383938 is 839383906491.

194609383938 is a `hidden beast` number, since 1 + 9 + 460 + 9 + 3 + 83 + 93 + 8 = 666.

194609383938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 97304691969 + 97304691969 = 311937^2 + 311937^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=311937.

It is a super-4 number, since 4×194609383938⁴ (a number of 46 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (194609383937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1819633 + ... + 1923611.

Almost surely, 2^194609383938 is an apocalyptic number.

194609383938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

194609383938 is an abundant number, since it is smaller than the sum of its proper divisors (227048336481).

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

194609383938 is an frugal number, since it uses more digits than its factorization.

194609383938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207966 (or 103984 counting only the distinct ones).

The product of its (nonzero) digits is 30233088, while the sum is 63.

The spelling of 194609383938 in words is "one hundred ninety-four billion, six hundred nine million, three hundred eighty-three thousand, nine hundred thirty-eight".