2768732809 has 4 divisors (see below), whose sum is σ = 2773250116. Its totient is φ = 2764215504.

The previous prime is 2768732807. The next prime is 2768732819. The reversal of 2768732809 is 9082378672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 544195584 + 2224537225 = 23328^2 + 47165^2 .

It is a cyclic number.

It is not a de Polignac number, because 2768732809 - 2¹ = 2768732807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2768732807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2257734 + ... + 2258959.

It is an arithmetic number, because the mean of its divisors is an integer number (693312529).

Almost surely, 2^2768732809 is an apocalyptic number.

It is an amenable number.

2768732809 is a deficient number, since it is larger than the sum of its proper divisors (4517307).

2768732809 is an equidigital number, since it uses as much as digits as its factorization.

2768732809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517306.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 2768732809 is about 52618.7495955577. The cubic root of 2768732809 is about 1404.1936853502.

The spelling of 2768732809 in words is "two billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, eight hundred nine".