505561505 has 16 divisors (see below), whose sum is σ = 633934080. Its totient is φ = 386324928.

The previous prime is 505561499. The next prime is 505561513. The reversal of 505561505 is 505165505.

It is not a de Polignac number, because 505561505 - 2⁴ = 505561489 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 15 ways as a sum of consecutive naturals, for example, 92684 + ... + 97986.

It is an arithmetic number, because the mean of its divisors is an integer number (39620880).

Almost surely, 2^505561505 is an apocalyptic number.

It is an amenable number.

505561505 is a deficient number, since it is larger than the sum of its proper divisors (128372575).

505561505 is a wasteful number, since it uses less digits than its factorization.

505561505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6160.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 505561505 is about 22484.6949056464. The cubic root of 505561505 is about 796.6324616847.

The spelling of 505561505 in words is "five hundred five million, five hundred sixty-one thousand, five hundred five".