12528958181 has 2 divisors, whose sum is σ = 12528958182. Its totient is φ = 12528958180.

The previous prime is 12528958151. The next prime is 12528958193. The reversal of 12528958181 is 18185982521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9572861281 + 2956096900 = 97841^2 + 54370^2 .

It is a cyclic number.

It is not a de Polignac number, because 12528958181 - 2¹⁰ = 12528957157 is a prime.

It is a super-2 number, since 2×12528958181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12528958151) 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, 6264479090 + 6264479091.

It is an arithmetic number, because the mean of its divisors is an integer number (6264479091).

Almost surely, 2^12528958181 is an apocalyptic number.

It is an amenable number.

12528958181 is a deficient number, since it is larger than the sum of its proper divisors (1).

12528958181 is an equidigital number, since it uses as much as digits as its factorization.

12528958181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460800, while the sum is 50.

The spelling of 12528958181 in words is "twelve billion, five hundred twenty-eight million, nine hundred fifty-eight thousand, one hundred eighty-one".