12565545073 has 2 divisors, whose sum is σ = 12565545074. Its totient is φ = 12565545072.

The previous prime is 12565545029. The next prime is 12565545089. The reversal of 12565545073 is 37054556521.

12565545073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10312808704 + 2252736369 = 101552^2 + 47463^2 .

It is a cyclic number.

It is not a de Polignac number, because 12565545073 - 2¹³ = 12565536881 is a prime.

It is not a weakly prime, because it can be changed into another prime (12565545973) 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, 6282772536 + 6282772537.

It is an arithmetic number, because the mean of its divisors is an integer number (6282772537).

Almost surely, 2^12565545073 is an apocalyptic number.

It is an amenable number.

12565545073 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565545073 is an equidigital number, since it uses as much as digits as its factorization.

12565545073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630000, while the sum is 43.

The spelling of 12565545073 in words is "twelve billion, five hundred sixty-five million, five hundred forty-five thousand, seventy-three".