2779216769 has 8 divisors (see below), whose sum is σ = 3285773760. Its totient is φ = 2300041296.

The previous prime is 2779216747. The next prime is 2779216787. The reversal of 2779216769 is 9676129772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2779216769 - 2⁸ = 2779216513 is a prime.

It is a super-2 number, since 2×2779216769² = 15448091698181598722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2779216789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6845159 + ... + 6845564.

It is an arithmetic number, because the mean of its divisors is an integer number (410721720).

Almost surely, 2^2779216769 is an apocalyptic number.

2779216769 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2779216769 is a deficient number, since it is larger than the sum of its proper divisors (506556991).

2779216769 is a wasteful number, since it uses less digits than its factorization.

2779216769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13690759.

The product of its digits is 4000752, while the sum is 56.

The square root of 2779216769 is about 52718.2773713254. The cubic root of 2779216769 is about 1405.9638053729.

The spelling of 2779216769 in words is "two billion, seven hundred seventy-nine million, two hundred sixteen thousand, seven hundred sixty-nine".