686354786304 has 192 divisors, whose sum is σ = 2082976197120. Its totient is φ = 198942965760.

The previous prime is 686354786263. The next prime is 686354786323. The reversal of 686354786304 is 403687453686.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1333659 + ... + 1775205.

It is an arithmetic number, because the mean of its divisors is an integer number (10848834360).

Almost surely, 2^686354786304 is an apocalyptic number.

686354786304 is a gapful number since it is divisible by the number (64) 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 686354786304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041488098560).

686354786304 is an abundant number, since it is smaller than the sum of its proper divisors (1396621410816).

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

686354786304 is a wasteful number, since it uses less digits than its factorization.

686354786304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441606 (or 441586 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 60.

The spelling of 686354786304 in words is "six hundred eighty-six billion, three hundred fifty-four million, seven hundred eighty-six thousand, three hundred four".