6780505049 has 2 divisors, whose sum is σ = 6780505050. Its totient is φ = 6780505048.

The previous prime is 6780505031. The next prime is 6780505079. The reversal of 6780505049 is 9405050876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6762595225 + 17909824 = 82235^2 + 4232^2 .

It is a cyclic number.

It is not a de Polignac number, because 6780505049 - 2¹² = 6780500953 is a prime.

It is not a weakly prime, because it can be changed into another prime (6780505019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3390252524 + 3390252525.

It is an arithmetic number, because the mean of its divisors is an integer number (3390252525).

Almost surely, 2^6780505049 is an apocalyptic number.

It is an amenable number.

6780505049 is a deficient number, since it is larger than the sum of its proper divisors (1).

6780505049 is an equidigital number, since it uses as much as digits as its factorization.

6780505049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 6780505049 is about 82343.8221665718. The cubic root of 6780505049 is about 1892.7242563631.

The spelling of 6780505049 in words is "six billion, seven hundred eighty million, five hundred five thousand, forty-nine".