28965776647 has 2 divisors, whose sum is σ = 28965776648. Its totient is φ = 28965776646.

The previous prime is 28965776629. The next prime is 28965776711. The reversal of 28965776647 is 74667756982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28965776647 - 2¹⁹ = 28965252359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28965776627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14482888323 + 14482888324.

It is an arithmetic number, because the mean of its divisors is an integer number (14482888324).

Almost surely, 2^28965776647 is an apocalyptic number.

28965776647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28965776647 is an equidigital number, since it uses as much as digits as its factorization.

28965776647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 213373440, while the sum is 67.

The spelling of 28965776647 in words is "twenty-eight billion, nine hundred sixty-five million, seven hundred seventy-six thousand, six hundred forty-seven".