2688779899 has 16 divisors (see below), whose sum is σ = 3022653760. Its totient is φ = 2375256960.

The previous prime is 2688779897. The next prime is 2688779909. The reversal of 2688779899 is 9989778862.

It is a cyclic number.

It is not a de Polignac number, because 2688779899 - 2¹ = 2688779897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688779897) 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, 16479 + ... + 75160.

It is an arithmetic number, because the mean of its divisors is an integer number (188915860).

Almost surely, 2^2688779899 is an apocalyptic number.

2688779899 is a deficient number, since it is larger than the sum of its proper divisors (333873861).

2688779899 is a wasteful number, since it uses less digits than its factorization.

2688779899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91750.

The product of its digits is 219469824, while the sum is 73.

The square root of 2688779899 is about 51853.4463560524. The cubic root of 2688779899 is about 1390.5451166629.

The spelling of 2688779899 in words is "two billion, six hundred eighty-eight million, seven hundred seventy-nine thousand, eight hundred ninety-nine".