685505050005 has 64 divisors (see below), whose sum is σ = 1131299020800. Its totient is φ = 354318624000.

The previous prime is 685505049997. The next prime is 685505050033. The reversal of 685505050005 is 500050505586.

It is not a de Polignac number, because 685505050005 - 2³ = 685505049997 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18736480 + ... + 18773030.

It is an arithmetic number, because the mean of its divisors is an integer number (17676547200).

Almost surely, 2^685505050005 is an apocalyptic number.

It is an amenable number.

685505050005 is a deficient number, since it is larger than the sum of its proper divisors (445793970795).

685505050005 is a wasteful number, since it uses less digits than its factorization.

685505050005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36922.

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 685505050005 in words is "six hundred eighty-five billion, five hundred five million, fifty thousand, five".