194644220161 has 8 divisors (see below), whose sum is σ = 198040953600. Its totient is φ = 191250742800.

The previous prime is 194644220159. The next prime is 194644220167. The reversal of 194644220161 is 161022446491.

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

It is a cyclic number.

It is not a de Polignac number, because 194644220161 - 2¹ = 194644220159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194644220167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 693265 + ... + 932686.

It is an arithmetic number, because the mean of its divisors is an integer number (24755119200).

Almost surely, 2^194644220161 is an apocalyptic number.

It is an amenable number.

194644220161 is a deficient number, since it is larger than the sum of its proper divisors (3396733439).

194644220161 is a wasteful number, since it uses less digits than its factorization.

194644220161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628039.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 194644220161 in words is "one hundred ninety-four billion, six hundred forty-four million, two hundred twenty thousand, one hundred sixty-one".