194939216973 has 16 divisors (see below), whose sum is σ = 288903853440. Its totient is φ = 129912221952.

The previous prime is 194939216929. The next prime is 194939216999. The reversal of 194939216973 is 379612939491.

194939216973 is a `hidden beast` number, since 19 + 4 + 9 + 392 + 169 + 73 = 666.

It is not a de Polignac number, because 194939216973 - 2¹² = 194939212877 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 194939216973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194939212973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1236961 + ... + 1385622.

It is an arithmetic number, because the mean of its divisors is an integer number (18056490840).

Almost surely, 2^194939216973 is an apocalyptic number.

It is an amenable number.

194939216973 is a deficient number, since it is larger than the sum of its proper divisors (93964636467).

194939216973 is a wasteful number, since it uses less digits than its factorization.

194939216973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625345 (or 2625339 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The spelling of 194939216973 in words is "one hundred ninety-four billion, nine hundred thirty-nine million, two hundred sixteen thousand, nine hundred seventy-three".