12540604521 has 16 divisors (see below), whose sum is σ = 17077245120. Its totient is φ = 8183400960.

The previous prime is 12540604507. The next prime is 12540604529.

12540604521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12540604521 - 2²⁵ = 12507050089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12540604529) 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 15 ways as a sum of consecutive naturals, for example, 110800 + ... + 193281.

It is an arithmetic number, because the mean of its divisors is an integer number (1067327820).

Almost surely, 2^12540604521 is an apocalyptic number.

It is an amenable number.

12540604521 is a deficient number, since it is larger than the sum of its proper divisors (4536640599).

12540604521 is a wasteful number, since it uses less digits than its factorization.

12540604521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304376.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 12540604521 in words is "twelve billion, five hundred forty million, six hundred four thousand, five hundred twenty-one".