405565252361 has 2 divisors, whose sum is σ = 405565252362. Its totient is φ = 405565252360.

The previous prime is 405565252357. The next prime is 405565252399. The reversal of 405565252361 is 163252565504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361869621136 + 43695631225 = 601556^2 + 209035^2 .

It is a cyclic number.

It is not a de Polignac number, because 405565252361 - 2² = 405565252357 is a prime.

It is not a weakly prime, because it can be changed into another prime (405565252321) 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, 202782626180 + 202782626181.

It is an arithmetic number, because the mean of its divisors is an integer number (202782626181).

Almost surely, 2^405565252361 is an apocalyptic number.

It is an amenable number.

405565252361 is a deficient number, since it is larger than the sum of its proper divisors (1).

405565252361 is an equidigital number, since it uses as much as digits as its factorization.

405565252361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 405565252361 in words is "four hundred five billion, five hundred sixty-five million, two hundred fifty-two thousand, three hundred sixty-one".