3778808769 has 6 divisors (see below), whose sum is σ = 5458279346. Its totient is φ = 2519205840.

The previous prime is 3778808743. The next prime is 3778808771. The reversal of 3778808769 is 9678088773.

It can be written as a sum of positive squares in only one way, i.e., 3621632400 + 157176369 = 60180^2 + 12537^2 .

It is not a de Polignac number, because 3778808769 - 2⁷ = 3778808641 is a prime.

It is a super-2 number, since 2×3778808769² = 28558791425342590722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3778808729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209933812 + ... + 209933829.

Almost surely, 2^3778808769 is an apocalyptic number.

It is an amenable number.

3778808769 is a deficient number, since it is larger than the sum of its proper divisors (1679470577).

3778808769 is a wasteful number, since it uses less digits than its factorization.

3778808769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419867647 (or 419867644 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The square root of 3778808769 is about 61472.0161455601. The cubic root of 3778808769 is about 1557.5845768564.

The spelling of 3778808769 in words is "three billion, seven hundred seventy-eight million, eight hundred eight thousand, seven hundred sixty-nine".