28778712713 has 2 divisors, whose sum is σ = 28778712714. Its totient is φ = 28778712712.

The previous prime is 28778712689. The next prime is 28778712733. The reversal of 28778712713 is 31721787782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28741099024 + 37613689 = 169532^2 + 6133^2 .

It is a cyclic number.

It is not a de Polignac number, because 28778712713 - 2¹² = 28778708617 is a prime.

It is not a weakly prime, because it can be changed into another prime (28778712733) 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, 14389356356 + 14389356357.

It is an arithmetic number, because the mean of its divisors is an integer number (14389356357).

Almost surely, 2^28778712713 is an apocalyptic number.

It is an amenable number.

28778712713 is a deficient number, since it is larger than the sum of its proper divisors (1).

28778712713 is an equidigital number, since it uses as much as digits as its factorization.

28778712713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843968, while the sum is 53.

The spelling of 28778712713 in words is "twenty-eight billion, seven hundred seventy-eight million, seven hundred twelve thousand, seven hundred thirteen".