194643717161 has 4 divisors (see below), whose sum is σ = 194660103552. Its totient is φ = 194627330772.

The previous prime is 194643717137. The next prime is 194643717179. The reversal of 194643717161 is 161717346491.

194643717161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194643717161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194643717661) 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 3 ways as a sum of consecutive naturals, for example, 8175365 + ... + 8199138.

It is an arithmetic number, because the mean of its divisors is an integer number (48665025888).

Almost surely, 2^194643717161 is an apocalyptic number.

It is an amenable number.

194643717161 is a deficient number, since it is larger than the sum of its proper divisors (16386391).

194643717161 is a wasteful number, since it uses less digits than its factorization.

194643717161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16386390.

The product of its digits is 762048, while the sum is 50.

The spelling of 194643717161 in words is "one hundred ninety-four billion, six hundred forty-three million, seven hundred seventeen thousand, one hundred sixty-one".