404434422181 has 2 divisors, whose sum is σ = 404434422182. Its totient is φ = 404434422180.

The previous prime is 404434422151. The next prime is 404434422239. The reversal of 404434422181 is 181224434404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266633845956 + 137800576225 = 516366^2 + 371215^2 .

It is a cyclic number.

It is not a de Polignac number, because 404434422181 - 2⁵ = 404434422149 is a prime.

It is a super-2 number, since 2×404434422181² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 404434422181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404434422121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202217211090 + 202217211091.

It is an arithmetic number, because the mean of its divisors is an integer number (202217211091).

Almost surely, 2^404434422181 is an apocalyptic number.

It is an amenable number.

404434422181 is a deficient number, since it is larger than the sum of its proper divisors (1).

404434422181 is an equidigital number, since it uses as much as digits as its factorization.

404434422181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98304, while the sum is 37.

Adding to 404434422181 its reverse (181224434404), we get a palindrome (585658856585).

The spelling of 404434422181 in words is "four hundred four billion, four hundred thirty-four million, four hundred twenty-two thousand, one hundred eighty-one".