194900656117 has 2 divisors, whose sum is σ = 194900656118. Its totient is φ = 194900656116.

The previous prime is 194900656081. The next prime is 194900656141. The reversal of 194900656117 is 711656009491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169487832721 + 25412823396 = 411689^2 + 159414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194900656117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194900626117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97450328058 + 97450328059.

It is an arithmetic number, because the mean of its divisors is an integer number (97450328059).

Almost surely, 2^194900656117 is an apocalyptic number.

It is an amenable number.

194900656117 is a deficient number, since it is larger than the sum of its proper divisors (1).

194900656117 is an equidigital number, since it uses as much as digits as its factorization.

194900656117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 194900656117 in words is "one hundred ninety-four billion, nine hundred million, six hundred fifty-six thousand, one hundred seventeen".