194316561 has 12 divisors (see below), whose sum is σ = 280869888. Its totient is φ = 129456504.

The previous prime is 194316557. The next prime is 194316611. The reversal of 194316561 is 165613491.

194316561 is a `hidden beast` number, since 1 + 94 + 3 + 1 + 6 + 561 = 666.

It is not a de Polignac number, because 194316561 - 2² = 194316557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (194316461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8476 + ... + 21458.

It is an arithmetic number, because the mean of its divisors is an integer number (23405824).

Almost surely, 2^194316561 is an apocalyptic number.

It is an amenable number.

194316561 is a deficient number, since it is larger than the sum of its proper divisors (86553327).

194316561 is a wasteful number, since it uses less digits than its factorization.

194316561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14652 (or 14649 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 194316561 is about 13939.7475228212. The cubic root of 194316561 is about 579.2107387909.

The spelling of 194316561 in words is "one hundred ninety-four million, three hundred sixteen thousand, five hundred sixty-one".