2756840257 has 2 divisors, whose sum is σ = 2756840258. Its totient is φ = 2756840256.

The previous prime is 2756840231. The next prime is 2756840267. The reversal of 2756840257 is 7520486572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2741150736 + 15689521 = 52356^2 + 3961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2756840257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2756840227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378420128 + 1378420129.

It is an arithmetic number, because the mean of its divisors is an integer number (1378420129).

Almost surely, 2^2756840257 is an apocalyptic number.

It is an amenable number.

2756840257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2756840257 is an equidigital number, since it uses as much as digits as its factorization.

2756840257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 940800, while the sum is 46.

The square root of 2756840257 is about 52505.6211943064. The cubic root of 2756840257 is about 1402.1803198466.

The spelling of 2756840257 in words is "two billion, seven hundred fifty-six million, eight hundred forty thousand, two hundred fifty-seven".