194900656189 has 2 divisors, whose sum is σ = 194900656190. Its totient is φ = 194900656188.

The previous prime is 194900656141. The next prime is 194900656193. The reversal of 194900656189 is 981656009491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181184732964 + 13715923225 = 425658^2 + 117115^2 .

It is a cyclic number.

It is not a de Polignac number, because 194900656189 - 2¹⁷ = 194900525117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194900656289) 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 as a sum of consecutive naturals, namely, 97450328094 + 97450328095.

It is an arithmetic number, because the mean of its divisors is an integer number (97450328095).

Almost surely, 2^194900656189 is an apocalyptic number.

It is an amenable number.

194900656189 is a deficient number, since it is larger than the sum of its proper divisors (1).

194900656189 is an equidigital number, since it uses as much as digits as its factorization.

194900656189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4199040, while the sum is 58.

The spelling of 194900656189 in words is "one hundred ninety-four billion, nine hundred million, six hundred fifty-six thousand, one hundred eighty-nine".