402144419917 has 2 divisors, whose sum is σ = 402144419918. Its totient is φ = 402144419916.

The previous prime is 402144419899. The next prime is 402144420017. The reversal of 402144419917 is 719914441204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 382652350921 + 19492068996 = 618589^2 + 139614^2 .

It is a cyclic number.

It is not a de Polignac number, because 402144419917 - 2¹⁵ = 402144387149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144410917) 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, 201072209958 + 201072209959.

It is an arithmetic number, because the mean of its divisors is an integer number (201072209959).

Almost surely, 2^402144419917 is an apocalyptic number.

It is an amenable number.

402144419917 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144419917 is an equidigital number, since it uses as much as digits as its factorization.

402144419917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 402144419917 in words is "four hundred two billion, one hundred forty-four million, four hundred nineteen thousand, nine hundred seventeen".