28108145537 has 2 divisors, whose sum is σ = 28108145538. Its totient is φ = 28108145536.

The previous prime is 28108145521. The next prime is 28108145567. The reversal of 28108145537 is 73554180182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16035410161 + 12072735376 = 126631^2 + 109876^2 .

It is a cyclic number.

It is not a de Polignac number, because 28108145537 - 2⁴ = 28108145521 is a prime.

It is not a weakly prime, because it can be changed into another prime (28108145567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14054072768 + 14054072769.

It is an arithmetic number, because the mean of its divisors is an integer number (14054072769).

Almost surely, 2^28108145537 is an apocalyptic number.

It is an amenable number.

28108145537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28108145537 is an equidigital number, since it uses as much as digits as its factorization.

28108145537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 28108145537 in words is "twenty-eight billion, one hundred eight million, one hundred forty-five thousand, five hundred thirty-seven".