405538383281 has 2 divisors, whose sum is σ = 405538383282. Its totient is φ = 405538383280.

The previous prime is 405538383259. The next prime is 405538383311. The reversal of 405538383281 is 182383835504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405291390625 + 246992656 = 636625^2 + 15716^2 .

It is a cyclic number.

It is not a de Polignac number, because 405538383281 - 2³⁴ = 388358514097 is a prime.

It is a super-2 number, since 2×405538383281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (405538383251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202769191640 + 202769191641.

It is an arithmetic number, because the mean of its divisors is an integer number (202769191641).

Almost surely, 2^405538383281 is an apocalyptic number.

It is an amenable number.

405538383281 is a deficient number, since it is larger than the sum of its proper divisors (1).

405538383281 is an equidigital number, since it uses as much as digits as its factorization.

405538383281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2764800, while the sum is 50.

The spelling of 405538383281 in words is "four hundred five billion, five hundred thirty-eight million, three hundred eighty-three thousand, two hundred eighty-one".