405505065 has 32 divisors (see below), whose sum is σ = 773738496. Its totient is φ = 177312960.

The previous prime is 405505039. The next prime is 405505073. The reversal of 405505065 is 560505504.

It is not a de Polignac number, because 405505065 - 2⁷ = 405504937 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81541 + ... + 86370.

It is an arithmetic number, because the mean of its divisors is an integer number (24179328).

Almost surely, 2^405505065 is an apocalyptic number.

It is an amenable number.

405505065 is a deficient number, since it is larger than the sum of its proper divisors (368233431).

405505065 is a wasteful number, since it uses less digits than its factorization.

405505065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167949.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 405505065 is about 20137.1563285385. The cubic root of 405505065 is about 740.1710494536.

The spelling of 405505065 in words is "four hundred five million, five hundred five thousand, sixty-five".