505686505 has 16 divisors (see below), whose sum is σ = 650661120. Its totient is φ = 375927552.

The previous prime is 505686499. The next prime is 505686509.

It is a happy number.

505686505 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 505686505 - 2¹⁵ = 505653737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505686509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30939 + ... + 44368.

It is an arithmetic number, because the mean of its divisors is an integer number (40666320).

Almost surely, 2^505686505 is an apocalyptic number.

It is an amenable number.

505686505 is a deficient number, since it is larger than the sum of its proper divisors (144974615).

505686505 is a wasteful number, since it uses less digits than its factorization.

505686505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75408.

The product of its (nonzero) digits is 180000, while the sum is 40.

The square root of 505686505 is about 22487.4744024312. The cubic root of 505686505 is about 796.6981120232.

The spelling of 505686505 in words is "five hundred five million, six hundred eighty-six thousand, five hundred five".