2685551648 has 48 divisors (see below), whose sum is σ = 5719170240. Its totient is φ = 1233981696.

The previous prime is 2685551647. The next prime is 2685551677. The reversal of 2685551648 is 8461555862.

It is a junction number, because it is equal to n+sod(n) for n = 2685551596 and 2685551605.

It is not an unprimeable number, because it can be changed into a prime (2685551647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80213 + ... + 108651.

It is an arithmetic number, because the mean of its divisors is an integer number (119149380).

Almost surely, 2^2685551648 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 2685551648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2859585120).

2685551648 is an abundant number, since it is smaller than the sum of its proper divisors (3033618592).

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

2685551648 is a wasteful number, since it uses less digits than its factorization.

2685551648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28689 (or 28681 counting only the distinct ones).

The product of its digits is 2304000, while the sum is 50.

The square root of 2685551648 is about 51822.3084009194. The cubic root of 2685551648 is about 1389.9883800764.

The spelling of 2685551648 in words is "two billion, six hundred eighty-five million, five hundred fifty-one thousand, six hundred forty-eight".