12582028521 has 6 divisors (see below), whose sum is σ = 18174041210. Its totient is φ = 8388019008.

The previous prime is 12582028507. The next prime is 12582028531.

12582028521 is a `hidden beast` number, since 1 + 2 + 582 + 0 + 28 + 52 + 1 = 666.

12582028521 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 12580762896 + 1265625 = 112164^2 + 1125^2 .

It is not a de Polignac number, because 12582028521 - 2³¹ = 10434544873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12582028531) 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 5 ways as a sum of consecutive naturals, for example, 699001576 + ... + 699001593.

Almost surely, 2^12582028521 is an apocalyptic number.

It is an amenable number.

12582028521 is a deficient number, since it is larger than the sum of its proper divisors (5592012689).

12582028521 is a wasteful number, since it uses less digits than its factorization.

12582028521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398003175 (or 1398003172 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The spelling of 12582028521 in words is "twelve billion, five hundred eighty-two million, twenty-eight thousand, five hundred twenty-one".