686616174360 has 256 divisors, whose sum is σ = 2347349155200. Its totient is φ = 178418073600.

The previous prime is 686616174323. The next prime is 686616174389. The reversal of 686616174360 is 63471616686.

It is a happy number.

686616174360 is a `hidden beast` number, since 6 + 8 + 6 + 616 + 17 + 4 + 3 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 686616174297 and 686616174306.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 38824720 + ... + 38842400.

Almost surely, 2^686616174360 is an apocalyptic number.

686616174360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686616174360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1173674577600).

686616174360 is an abundant number, since it is smaller than the sum of its proper divisors (1660732980840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686616174360 is a wasteful number, since it uses less digits than its factorization.

686616174360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18619 (or 18609 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 686616174360 in words is "six hundred eighty-six billion, six hundred sixteen million, one hundred seventy-four thousand, three hundred sixty".