194574760561 has 2 divisors, whose sum is σ = 194574760562. Its totient is φ = 194574760560.

The previous prime is 194574760483. The next prime is 194574760571. The reversal of 194574760561 is 165067475491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118208754225 + 76366006336 = 343815^2 + 276344^2 .

It is a cyclic number.

It is not a de Polignac number, because 194574760561 - 2²⁷ = 194440542833 is a prime.

It is not a weakly prime, because it can be changed into another prime (194574760571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97287380280 + 97287380281.

It is an arithmetic number, because the mean of its divisors is an integer number (97287380281).

Almost surely, 2^194574760561 is an apocalyptic number.

It is an amenable number.

194574760561 is a deficient number, since it is larger than the sum of its proper divisors (1).

194574760561 is an equidigital number, since it uses as much as digits as its factorization.

194574760561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6350400, while the sum is 55.

The spelling of 194574760561 in words is "one hundred ninety-four billion, five hundred seventy-four million, seven hundred sixty thousand, five hundred sixty-one".