194422130261 has 2 divisors, whose sum is σ = 194422130262. Its totient is φ = 194422130260.

The previous prime is 194422130219. The next prime is 194422130341. The reversal of 194422130261 is 162031224491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193943352100 + 478778161 = 440390^2 + 21881^2 .

It is a cyclic number.

It is not a de Polignac number, because 194422130261 - 2⁶ = 194422130197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194422135261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97211065130 + 97211065131.

It is an arithmetic number, because the mean of its divisors is an integer number (97211065131).

Almost surely, 2^194422130261 is an apocalyptic number.

It is an amenable number.

194422130261 is a deficient number, since it is larger than the sum of its proper divisors (1).

194422130261 is an equidigital number, since it uses as much as digits as its factorization.

194422130261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 194422130261 in words is "one hundred ninety-four billion, four hundred twenty-two million, one hundred thirty thousand, two hundred sixty-one".