402444130441 has 2 divisors, whose sum is σ = 402444130442. Its totient is φ = 402444130440.

The previous prime is 402444130433. The next prime is 402444130477. The reversal of 402444130441 is 144031444204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245941605625 + 156502524816 = 495925^2 + 395604^2 .

It is a cyclic number.

It is not a de Polignac number, because 402444130441 - 2³ = 402444130433 is a prime.

It is a super-2 number, since 2×402444130441² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402444130481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201222065220 + 201222065221.

It is an arithmetic number, because the mean of its divisors is an integer number (201222065221).

Almost surely, 2^402444130441 is an apocalyptic number.

It is an amenable number.

402444130441 is a deficient number, since it is larger than the sum of its proper divisors (1).

402444130441 is an equidigital number, since it uses as much as digits as its factorization.

402444130441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 402444130441 its reverse (144031444204), we get a palindrome (546475574645).

The spelling of 402444130441 in words is "four hundred two billion, four hundred forty-four million, one hundred thirty thousand, four hundred forty-one".