686382864927 has 16 divisors (see below), whose sum is σ = 927938119680. Its totient is φ = 451211124672.

The previous prime is 686382864919. The next prime is 686382864943. The reversal of 686382864927 is 729468283686.

It is not a de Polignac number, because 686382864927 - 2³ = 686382864919 is a prime.

It is a super-2 number, since 2×686382864927² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686382864977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534028 + ... + 1287614.

It is an arithmetic number, because the mean of its divisors is an integer number (57996132480).

Almost surely, 2^686382864927 is an apocalyptic number.

686382864927 is a deficient number, since it is larger than the sum of its proper divisors (241555254753).

686382864927 is a wasteful number, since it uses less digits than its factorization.

686382864927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757822.

The product of its digits is 334430208, while the sum is 69.

The spelling of 686382864927 in words is "six hundred eighty-six billion, three hundred eighty-two million, eight hundred sixty-four thousand, nine hundred twenty-seven".