194144221924 has 27 divisors (see below), whose sum is σ = 342251884611. Its totient is φ = 96363156600.

The previous prime is 194144221883. The next prime is 194144221939. The reversal of 194144221924 is 429122441491.

The square root of 194144221924 is 440618.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 133065907 + ... + 133067365.

Almost surely, 2^194144221924 is an apocalyptic number.

194144221924 is the 440618-th square number.

It is an amenable number.

194144221924 is a deficient number, since it is larger than the sum of its proper divisors (148107662687).

194144221924 is an frugal number, since it uses more digits than its factorization.

194144221924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 1612 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The spelling of 194144221924 in words is "one hundred ninety-four billion, one hundred forty-four million, two hundred twenty-one thousand, nine hundred twenty-four".