686133375823 has 4 divisors (see below), whose sum is σ = 784152429520. Its totient is φ = 588114322128.

The previous prime is 686133375737. The next prime is 686133375839. The reversal of 686133375823 is 328573331686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 686133375823 - 2²⁹ = 685596504911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686133375853) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 49009526838 + ... + 49009526851.

It is an arithmetic number, because the mean of its divisors is an integer number (196038107380).

Almost surely, 2^686133375823 is an apocalyptic number.

686133375823 is a deficient number, since it is larger than the sum of its proper divisors (98019053697).

686133375823 is an equidigital number, since it uses as much as digits as its factorization.

686133375823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98019053696.

The product of its digits is 13063680, while the sum is 55.

The spelling of 686133375823 in words is "six hundred eighty-six billion, one hundred thirty-three million, three hundred seventy-five thousand, eight hundred twenty-three".