12528766539 has 12 divisors (see below), whose sum is σ = 19161643176. Its totient is φ = 7861186752.

The previous prime is 12528766531. The next prime is 12528766541. The reversal of 12528766539 is 93566782521.

12528766539 is a `hidden beast` number, since 1 + 2 + 528 + 7 + 66 + 53 + 9 = 666.

It is not a de Polignac number, because 12528766539 - 2³ = 12528766531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12528766531) 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 in 11 ways as a sum of consecutive naturals, for example, 40943529 + ... + 40943834.

It is an arithmetic number, because the mean of its divisors is an integer number (1596803598).

Almost surely, 2^12528766539 is an apocalyptic number.

12528766539 is a deficient number, since it is larger than the sum of its proper divisors (6632876637).

12528766539 is a wasteful number, since it uses less digits than its factorization.

12528766539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81887386 (or 81887383 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 12528766539 in words is "twelve billion, five hundred twenty-eight million, seven hundred sixty-six thousand, five hundred thirty-nine".