28274272777 has 2 divisors, whose sum is σ = 28274272778. Its totient is φ = 28274272776.

The previous prime is 28274272771. The next prime is 28274272781. The reversal of 28274272777 is 77727247282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28270723321 + 3549456 = 168139^2 + 1884^2 .

It is a cyclic number.

It is not a de Polignac number, because 28274272777 - 2¹¹ = 28274270729 is a prime.

It is not a weakly prime, because it can be changed into another prime (28274272771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14137136388 + 14137136389.

It is an arithmetic number, because the mean of its divisors is an integer number (14137136389).

Almost surely, 2^28274272777 is an apocalyptic number.

It is an amenable number.

28274272777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28274272777 is an equidigital number, since it uses as much as digits as its factorization.

28274272777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8605184, while the sum is 55.

The spelling of 28274272777 in words is "twenty-eight billion, two hundred seventy-four million, two hundred seventy-two thousand, seven hundred seventy-seven".