686561834335 has 32 divisors (see below), whose sum is σ = 949125364992. Its totient is φ = 472256593920.

The previous prime is 686561834243. The next prime is 686561834389. The reversal of 686561834335 is 533438165686.

It is not a de Polignac number, because 686561834335 - 2⁹ = 686561833823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 686561834335.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3095511 + ... + 3309880.

It is an arithmetic number, because the mean of its divisors is an integer number (29660167656).

Almost surely, 2^686561834335 is an apocalyptic number.

686561834335 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

686561834335 is a deficient number, since it is larger than the sum of its proper divisors (262563530657).

686561834335 is a wasteful number, since it uses less digits than its factorization.

686561834335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6405523.

The product of its digits is 37324800, while the sum is 58.

The spelling of 686561834335 in words is "six hundred eighty-six billion, five hundred sixty-one million, eight hundred thirty-four thousand, three hundred thirty-five".