28977632777 has 2 divisors, whose sum is σ = 28977632778. Its totient is φ = 28977632776.

The previous prime is 28977632767. The next prime is 28977632779. The reversal of 28977632777 is 77723677982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28969401616 + 8231161 = 170204^2 + 2869^2 .

It is a cyclic number.

It is not a de Polignac number, because 28977632777 - 2³⁰ = 27903890953 is a prime.

Together with 28977632779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28977632779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14488816388 + 14488816389.

It is an arithmetic number, because the mean of its divisors is an integer number (14488816389).

Almost surely, 2^28977632777 is an apocalyptic number.

It is an amenable number.

28977632777 is a deficient number, since it is larger than the sum of its proper divisors (1).

28977632777 is an equidigital number, since it uses as much as digits as its factorization.

28977632777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87127488, while the sum is 65.

The spelling of 28977632777 in words is "twenty-eight billion, nine hundred seventy-seven million, six hundred thirty-two thousand, seven hundred seventy-seven".