194388189361 has 8 divisors (see below), whose sum is σ = 203441756544. Its totient is φ = 185384781120.

The previous prime is 194388189349. The next prime is 194388189451. The reversal of 194388189361 is 163981883491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194388189361 - 2⁵ = 194388189329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194388189361.

It is not an unprimeable number, because it can be changed into a prime (194388189761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12531805 + ... + 12547306.

It is an arithmetic number, because the mean of its divisors is an integer number (25430219568).

Almost surely, 2^194388189361 is an apocalyptic number.

It is an amenable number.

194388189361 is a deficient number, since it is larger than the sum of its proper divisors (9053567183).

194388189361 is a wasteful number, since it uses less digits than its factorization.

194388189361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25079471.

The product of its digits is 8957952, while the sum is 61.

The spelling of 194388189361 in words is "one hundred ninety-four billion, three hundred eighty-eight million, one hundred eighty-nine thousand, three hundred sixty-one".