686368855 has 8 divisors (see below), whose sum is σ = 823976064. Its totient is φ = 548872800.

The previous prime is 686368853. The next prime is 686368909. The reversal of 686368855 is 558863686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 686368855 - 2¹ = 686368853 is a prime.

It is a super-3 number, since 3×686368855³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 686368796 and 686368805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686368853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13536 + ... + 39445.

It is an arithmetic number, because the mean of its divisors is an integer number (102997008).

Almost surely, 2^686368855 is an apocalyptic number.

686368855 is a deficient number, since it is larger than the sum of its proper divisors (137607209).

686368855 is a wasteful number, since it uses less digits than its factorization.

686368855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55577.

The product of its digits is 8294400, while the sum is 55.

The square root of 686368855 is about 26198.6422358106. The cubic root of 686368855 is about 882.1027774130.

The spelling of 686368855 in words is "six hundred eighty-six million, three hundred sixty-eight thousand, eight hundred fifty-five".