685804129005 has 16 divisors (see below), whose sum is σ = 1097346423744. Its totient is φ = 365742263040.

The previous prime is 685804128943. The next prime is 685804129027. The reversal of 685804129005 is 500921408586.

It is not a de Polignac number, because 685804129005 - 2¹² = 685804124909 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 959739 + ... + 1514168.

It is an arithmetic number, because the mean of its divisors is an integer number (68584151484).

Almost surely, 2^685804129005 is an apocalyptic number.

It is an amenable number.

685804129005 is a deficient number, since it is larger than the sum of its proper divisors (411542294739).

685804129005 is a wasteful number, since it uses less digits than its factorization.

685804129005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2492396.

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 685804129005 in words is "six hundred eighty-five billion, eight hundred four million, one hundred twenty-nine thousand, five".