404411242181 has 2 divisors, whose sum is σ = 404411242182. Its totient is φ = 404411242180.

The previous prime is 404411242139. The next prime is 404411242253. The reversal of 404411242181 is 181242114404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395629678081 + 8781564100 = 628991^2 + 93710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404411242181 is a prime.

It is a super-2 number, since 2×404411242181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404411245181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202205621090 + 202205621091.

It is an arithmetic number, because the mean of its divisors is an integer number (202205621091).

Almost surely, 2^404411242181 is an apocalyptic number.

It is an amenable number.

404411242181 is a deficient number, since it is larger than the sum of its proper divisors (1).

404411242181 is an equidigital number, since it uses as much as digits as its factorization.

404411242181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8192, while the sum is 32.

Adding to 404411242181 its reverse (181242114404), we get a palindrome (585653356585).

The spelling of 404411242181 in words is "four hundred four billion, four hundred eleven million, two hundred forty-two thousand, one hundred eighty-one".