686860368191 has 8 divisors (see below), whose sum is σ = 687350815968. Its totient is φ = 686370060000.

The previous prime is 686860368179. The next prime is 686860368197. The reversal of 686860368191 is 191863068686.

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

It is a cyclic number.

It is not a de Polignac number, because 686860368191 - 2³⁰ = 685786626367 is a prime.

It is a super-2 number, since 2×686860368191² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686860368197) 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, 11034686 + ... + 11096756.

It is an arithmetic number, because the mean of its divisors is an integer number (85918851996).

Almost surely, 2^686860368191 is an apocalyptic number.

686860368191 is a deficient number, since it is larger than the sum of its proper divisors (490447777).

686860368191 is a wasteful number, since it uses less digits than its factorization.

686860368191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69793.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 686860368191 in words is "six hundred eighty-six billion, eight hundred sixty million, three hundred sixty-eight thousand, one hundred ninety-one".