2680555780 has 72 divisors (see below), whose sum is σ = 6564376728. Its totient is φ = 916780032.

The previous prime is 2680555751. The next prime is 2680555781. The reversal of 2680555780 is 875550862.

It can be written as a sum of positive squares in 4 ways, for example, as 37773316 + 2642782464 = 6146^2 + 51408^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2680555780.

It is not an unprimeable number, because it can be changed into a prime (2680555781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421182 + ... + 427498.

It is an arithmetic number, because the mean of its divisors is an integer number (91171899).

Almost surely, 2^2680555780 is an apocalyptic number.

2680555780 is a gapful number since it is divisible by the number (20) 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 2680555780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3282188364).

2680555780 is an abundant number, since it is smaller than the sum of its proper divisors (3883820948).

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

2680555780 is a wasteful number, since it uses less digits than its factorization.

2680555780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773 (or 6764 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 46.

The square root of 2680555780 is about 51774.0840575669. The cubic root of 2680555780 is about 1389.1259242539.

The spelling of 2680555780 in words is "two billion, six hundred eighty million, five hundred fifty-five thousand, seven hundred eighty".