28772777833 has 2 divisors, whose sum is σ = 28772777834. Its totient is φ = 28772777832.

The previous prime is 28772777821. The next prime is 28772777849. The reversal of 28772777833 is 33877727782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25113374784 + 3659403049 = 158472^2 + 60493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28772777833 is a prime.

It is not a weakly prime, because it can be changed into another prime (28772747833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14386388916 + 14386388917.

It is an arithmetic number, because the mean of its divisors is an integer number (14386388917).

Almost surely, 2^28772777833 is an apocalyptic number.

It is an amenable number.

28772777833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28772777833 is an equidigital number, since it uses as much as digits as its factorization.

28772777833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38723328, while the sum is 61.

The spelling of 28772777833 in words is "twenty-eight billion, seven hundred seventy-two million, seven hundred seventy-seven thousand, eight hundred thirty-three".