194389842242 has 18 divisors (see below), whose sum is σ = 295816802547. Its totient is φ = 95804155300.

The previous prime is 194389842211. The next prime is 194389842247. The reversal of 194389842242 is 242248983491.

It can be written as a sum of positive squares in only one way, i.e., 97194921121 + 97194921121 = 311761^2 + 311761^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=311761.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194389842247) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 44267867 + ... + 44272257.

Almost surely, 2^194389842242 is an apocalyptic number.

194389842242 is a deficient number, since it is larger than the sum of its proper divisors (101426960305).

194389842242 is an frugal number, since it uses more digits than its factorization.

194389842242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8926 (or 4464 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 56.

The spelling of 194389842242 in words is "one hundred ninety-four billion, three hundred eighty-nine million, eight hundred forty-two thousand, two hundred forty-two".