686811337508878 has 8 divisors (see below), whose sum is σ = 1075009050013968. Its totient is φ = 328474987504224.

The previous prime is 686811337508873. The next prime is 686811337508911. The reversal of 686811337508878 is 878805733118686.

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

It is a junction number, because it is equal to n+sod(n) for n = 686811337508798 and 686811337508807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686811337508873) 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, 7465340625051 + ... + 7465340625142.

It is an arithmetic number, because the mean of its divisors is an integer number (134376131251746).

Almost surely, 2^{686811337508878} is an apocalyptic number.

686811337508878 is a deficient number, since it is larger than the sum of its proper divisors (388197712505090).

686811337508878 is a wasteful number, since it uses less digits than its factorization.

686811337508878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14930681250218.

The product of its (nonzero) digits is 2601123840, while the sum is 79.

The spelling of 686811337508878 in words is "six hundred eighty-six trillion, eight hundred eleven billion, three hundred thirty-seven million, five hundred eight thousand, eight hundred seventy-eight".