28776280537 has 2 divisors, whose sum is σ = 28776280538. Its totient is φ = 28776280536.

The previous prime is 28776280531. The next prime is 28776280553. The reversal of 28776280537 is 73508267782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27941128336 + 835152201 = 167156^2 + 28899^2 .

It is a cyclic number.

It is not a de Polignac number, because 28776280537 - 2²⁷ = 28642062809 is a prime.

It is not a weakly prime, because it can be changed into another prime (28776280531) 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, 14388140268 + 14388140269.

It is an arithmetic number, because the mean of its divisors is an integer number (14388140269).

Almost surely, 2^28776280537 is an apocalyptic number.

It is an amenable number.

28776280537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28776280537 is an equidigital number, since it uses as much as digits as its factorization.

28776280537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 28776280537 in words is "twenty-eight billion, seven hundred seventy-six million, two hundred eighty thousand, five hundred thirty-seven".