28760617777 has 2 divisors, whose sum is σ = 28760617778. Its totient is φ = 28760617776.

The previous prime is 28760617771. The next prime is 28760617859. The reversal of 28760617777 is 77771606782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15126786081 + 13633831696 = 122991^2 + 116764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28760617777 is a prime.

It is not a weakly prime, because it can be changed into another prime (28760617771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14380308888 + 14380308889.

It is an arithmetic number, because the mean of its divisors is an integer number (14380308889).

Almost surely, 2^28760617777 is an apocalyptic number.

It is an amenable number.

28760617777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28760617777 is an equidigital number, since it uses as much as digits as its factorization.

28760617777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9680832, while the sum is 58.

The spelling of 28760617777 in words is "twenty-eight billion, seven hundred sixty million, six hundred seventeen thousand, seven hundred seventy-seven".