686858428416 has 112 divisors (see below), whose sum is σ = 1853582580864. Its totient is φ = 226193670144.

The previous prime is 686858428411. The next prime is 686858428441. The reversal of 686858428416 is 614824858686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686858428411) 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, 1871445 + ... + 2208171.

It is an arithmetic number, because the mean of its divisors is an integer number (16549844472).

Almost surely, 2^686858428416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686858428416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926791290432).

686858428416 is an abundant number, since it is smaller than the sum of its proper divisors (1166724152448).

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

686858428416 is an equidigital number, since it uses as much as digits as its factorization.

686858428416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336839 (or 336815 counting only the distinct ones).

The product of its digits is 141557760, while the sum is 66.

The spelling of 686858428416 in words is "six hundred eighty-six billion, eight hundred fifty-eight million, four hundred twenty-eight thousand, four hundred sixteen".