28073777377 has 2 divisors, whose sum is σ = 28073777378. Its totient is φ = 28073777376.

The previous prime is 28073777359. The next prime is 28073777387. The reversal of 28073777377 is 77377737082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28049215441 + 24561936 = 167479^2 + 4956^2 .

It is a cyclic number.

It is not a de Polignac number, because 28073777377 - 2¹¹ = 28073775329 is a prime.

It is not a weakly prime, because it can be changed into another prime (28073777387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14036888688 + 14036888689.

It is an arithmetic number, because the mean of its divisors is an integer number (14036888689).

Almost surely, 2^28073777377 is an apocalyptic number.

It is an amenable number.

28073777377 is a deficient number, since it is larger than the sum of its proper divisors (1).

28073777377 is an equidigital number, since it uses as much as digits as its factorization.

28073777377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16941456, while the sum is 58.

The spelling of 28073777377 in words is "twenty-eight billion, seventy-three million, seven hundred seventy-seven thousand, three hundred seventy-seven".