28266559771 has 2 divisors, whose sum is σ = 28266559772. Its totient is φ = 28266559770.

The previous prime is 28266559729. The next prime is 28266559823. The reversal of 28266559771 is 17795566282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28266559771 - 2⁹ = 28266559259 is a prime.

It is not a weakly prime, because it can be changed into another prime (28266559171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14133279885 + 14133279886.

It is an arithmetic number, because the mean of its divisors is an integer number (14133279886).

Almost surely, 2^28266559771 is an apocalyptic number.

28266559771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28266559771 is an equidigital number, since it uses as much as digits as its factorization.

28266559771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12700800, while the sum is 58.

The spelling of 28266559771 in words is "twenty-eight billion, two hundred sixty-six million, five hundred fifty-nine thousand, seven hundred seventy-one".