2756728613 has 2 divisors, whose sum is σ = 2756728614. Its totient is φ = 2756728612.

The previous prime is 2756728609. The next prime is 2756728657. The reversal of 2756728613 is 3168276572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2309955844 + 446772769 = 48062^2 + 21137^2 .

It is a cyclic number.

It is not a de Polignac number, because 2756728613 - 2² = 2756728609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2756728693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378364306 + 1378364307.

It is an arithmetic number, because the mean of its divisors is an integer number (1378364307).

Almost surely, 2^2756728613 is an apocalyptic number.

It is an amenable number.

2756728613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2756728613 is an equidigital number, since it uses as much as digits as its factorization.

2756728613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 2756728613 is about 52504.5580211852. The cubic root of 2756728613 is about 1402.1613915182.

The spelling of 2756728613 in words is "two billion, seven hundred fifty-six million, seven hundred twenty-eight thousand, six hundred thirteen".