6780369649 has 9 divisors (see below), whose sum is σ = 6888684747. Its totient is φ = 6673735464.

The previous prime is 6780369647. The next prime is 6780369671. The reversal of 6780369649 is 9469630876.

The square root of 6780369649 is 82343.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6692385249 + 87984400 = 81807^2 + 9380^2 .

It is not a de Polignac number, because 6780369649 - 2¹ = 6780369647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6780369593 and 6780369602.

It is not an unprimeable number, because it can be changed into a prime (6780369643) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5516367 + ... + 5517595.

Almost surely, 2^6780369649 is an apocalyptic number.

6780369649 is the 82343-rd square number.

6780369649 is the 41172-nd centered octagonal number.

It is an amenable number.

6780369649 is a deficient number, since it is larger than the sum of its proper divisors (108315098).

6780369649 is an frugal number, since it uses more digits than its factorization.

6780369649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2592 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 58.

The cubic root of 6780369649 is about 1892.7116576669.

The spelling of 6780369649 in words is "six billion, seven hundred eighty million, three hundred sixty-nine thousand, six hundred forty-nine".