685204140105 has 128 divisors (see below), whose sum is σ = 1295965440000. Its totient is φ = 342522535680.

The previous prime is 685204140041. The next prime is 685204140197. The reversal of 685204140105 is 501041402586.

It is a happy number.

It is not a de Polignac number, because 685204140105 - 2⁶ = 685204140041 is a prime.

It is a super-2 number, since 2×685204140105² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685204140105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 117266314 + ... + 117272156.

It is an arithmetic number, because the mean of its divisors is an integer number (10124730000).

Almost surely, 2^685204140105 is an apocalyptic number.

It is an amenable number.

685204140105 is a deficient number, since it is larger than the sum of its proper divisors (610761299895).

685204140105 is a wasteful number, since it uses less digits than its factorization.

685204140105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356 (or 6350 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 685204140105 in words is "six hundred eighty-five billion, two hundred four million, one hundred forty thousand, one hundred five".