194464081389 has 8 divisors (see below), whose sum is σ = 259884255232. Its totient is φ = 129343314240.

The previous prime is 194464081351. The next prime is 194464081451. The reversal of 194464081389 is 983180464491.

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

It is not a de Polignac number, because 194464081389 - 2⁷ = 194464081261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194464081349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74850157 + ... + 74852754.

It is an arithmetic number, because the mean of its divisors is an integer number (32485531904).

Almost surely, 2^194464081389 is an apocalyptic number.

It is an amenable number.

194464081389 is a deficient number, since it is larger than the sum of its proper divisors (65420173843).

194464081389 is a wasteful number, since it uses less digits than its factorization.

194464081389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149703347.

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 194464081389 in words is "one hundred ninety-four billion, four hundred sixty-four million, eighty-one thousand, three hundred eighty-nine".