2688209459776 has 21 divisors (see below), whose sum is σ = 5334441675139. Its totient is φ = 1344098171584.

The previous prime is 2688209459753. The next prime is 2688209459801. The reversal of 2688209459776 is 6779549028862.

The square root of 2688209459776 is 1639576.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2688209459699 and 2688209459708.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13014135 + ... + 13219081.

Almost surely, 2^{2688209459776} is an apocalyptic number.

2688209459776 is the 1639576-th square number.

It is an amenable number.

2688209459776 is a deficient number, since it is larger than the sum of its proper divisors (2646232215363).

2688209459776 is an frugal number, since it uses more digits than its factorization.

2688209459776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409906 (or 204949 counting only the distinct ones).

The product of its (nonzero) digits is 731566080, while the sum is 73.

The spelling of 2688209459776 in words is "two trillion, six hundred eighty-eight billion, two hundred nine million, four hundred fifty-nine thousand, seven hundred seventy-six".