194984085639 has 32 divisors (see below), whose sum is σ = 297628093440. Its totient is φ = 111228595200.

The previous prime is 194984085613. The next prime is 194984085677. The reversal of 194984085639 is 936580489491.

194984085639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-194984085639 is a prime.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 194984085639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194984085239) 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 31 ways as a sum of consecutive naturals, for example, 54447829 + ... + 54451409.

It is an arithmetic number, because the mean of its divisors is an integer number (9300877920).

Almost surely, 2^194984085639 is an apocalyptic number.

194984085639 is a deficient number, since it is larger than the sum of its proper divisors (102644007801).

194984085639 is a wasteful number, since it uses less digits than its factorization.

194984085639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7311.

The product of its (nonzero) digits is 67184640, while the sum is 66.

The spelling of 194984085639 in words is "one hundred ninety-four billion, nine hundred eighty-four million, eighty-five thousand, six hundred thirty-nine".