2688685056 has 176 divisors, whose sum is σ = 8222062080. Its totient is φ = 867041280.

The previous prime is 2688685019. The next prime is 2688685057. The reversal of 2688685056 is 6505868862.

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 = 2688684993 and 2688685011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688685057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855520 + ... + 858656.

Almost surely, 2^2688685056 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 2688685056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4111031040).

2688685056 is an abundant number, since it is smaller than the sum of its proper divisors (5533377024).

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

2688685056 is a wasteful number, since it uses less digits than its factorization.

2688685056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3197 (or 3173 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The square root of 2688685056 is about 51852.5318186104. The cubic root of 2688685056 is about 1390.5287666174.

The spelling of 2688685056 in words is "two billion, six hundred eighty-eight million, six hundred eighty-five thousand, fifty-six".