504405505 has 16 divisors (see below), whose sum is σ = 617730624. Its totient is φ = 395254080.

The previous prime is 504405449. The next prime is 504405509. The reversal of 504405505 is 505504405.

It is not a de Polignac number, because 504405505 - 2²⁷ = 370187777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (504405509) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 213742 + ... + 216088.

It is an arithmetic number, because the mean of its divisors is an integer number (38608164).

Almost surely, 2^504405505 is an apocalyptic number.

It is an amenable number.

504405505 is a deficient number, since it is larger than the sum of its proper divisors (113325119).

504405505 is a wasteful number, since it uses less digits than its factorization.

504405505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 504405505 is about 22458.9738189437. The cubic root of 504405505 is about 796.0248139407.

It can be divided in two parts, 50440 and 5505, that added together give a triangular number (55945 = T₃₃₄).

The spelling of 504405505 in words is "five hundred four million, four hundred five thousand, five hundred five".