28610765761 has 2 divisors, whose sum is σ = 28610765762. Its totient is φ = 28610765760.

The previous prime is 28610765719. The next prime is 28610765773. The reversal of 28610765761 is 16756701682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17773955761 + 10836810000 = 133319^2 + 104100^2 .

It is a cyclic number.

It is not a de Polignac number, because 28610765761 - 2⁷ = 28610765633 is a prime.

It is not a weakly prime, because it can be changed into another prime (28610768761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14305382880 + 14305382881.

It is an arithmetic number, because the mean of its divisors is an integer number (14305382881).

Almost surely, 2^28610765761 is an apocalyptic number.

It is an amenable number.

28610765761 is a deficient number, since it is larger than the sum of its proper divisors (1).

28610765761 is an equidigital number, since it uses as much as digits as its factorization.

28610765761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 28610765761 in words is "twenty-eight billion, six hundred ten million, seven hundred sixty-five thousand, seven hundred sixty-one".