405404999999 has 2 divisors, whose sum is σ = 405405000000. Its totient is φ = 405404999998.

The previous prime is 405404999977. The next prime is 405405000001. The reversal of 405404999999 is 999999404504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405404999999 - 2¹⁶ = 405404934463 is a prime.

Together with 405405000001, it forms a pair of twin primes.

It is a Chen prime.

405404999999 is a modest number, since divided by 999999 gives 405404 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405404999099) 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, 202702499999 + 202702500000.

It is an arithmetic number, because the mean of its divisors is an integer number (202702500000).

Almost surely, 2^405404999999 is an apocalyptic number.

405404999999 is a deficient number, since it is larger than the sum of its proper divisors (1).

405404999999 is an equidigital number, since it uses as much as digits as its factorization.

405404999999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 170061120, while the sum is 71.

The spelling of 405404999999 in words is "four hundred five billion, four hundred four million, nine hundred ninety-nine thousand, nine hundred ninety-nine".