402144322441 has 2 divisors, whose sum is σ = 402144322442. Its totient is φ = 402144322440.

The previous prime is 402144322439. The next prime is 402144322523. The reversal of 402144322441 is 144223441204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401702440000 + 441882441 = 633800^2 + 21021^2 .

It is a cyclic number.

It is not a de Polignac number, because 402144322441 - 2¹ = 402144322439 is a prime.

Together with 402144322439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402144322421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072161220 + 201072161221.

It is an arithmetic number, because the mean of its divisors is an integer number (201072161221).

Almost surely, 2^402144322441 is an apocalyptic number.

It is an amenable number.

402144322441 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144322441 is an equidigital number, since it uses as much as digits as its factorization.

402144322441 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 402144322441 its reverse (144223441204), we get a palindrome (546367763645).

The spelling of 402144322441 in words is "four hundred two billion, one hundred forty-four million, three hundred twenty-two thousand, four hundred forty-one".