194194444443 has 16 divisors (see below), whose sum is σ = 259322384160. Its totient is φ = 129264816384.

The previous prime is 194194444441. The next prime is 194194444447. The reversal of 194194444443 is 344444491491.

It is not a de Polignac number, because 194194444443 - 2¹ = 194194444441 is a prime.

It is a super-2 number, since 2×194194444443² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194194444441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14076393 + ... + 14090181.

It is an arithmetic number, because the mean of its divisors is an integer number (16207649010).

Almost surely, 2^194194444443 is an apocalyptic number.

194194444443 is a deficient number, since it is larger than the sum of its proper divisors (65127939717).

194194444443 is a wasteful number, since it uses less digits than its factorization.

194194444443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20638.

The product of its digits is 3981312, while the sum is 51.

The spelling of 194194444443 in words is "one hundred ninety-four billion, one hundred ninety-four million, four hundred forty-four thousand, four hundred forty-three".