12576667521 has 24 divisors (see below), whose sum is σ = 18930100672. Its totient is φ = 7416208800.

The previous prime is 12576667501. The next prime is 12576667553.

12576667521 is nontrivially palindromic in base 10.

12576667521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12576667521 - 2²¹ = 12574570369 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12576667501) 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 in 23 ways as a sum of consecutive naturals, for example, 454765 + ... + 481626.

Almost surely, 2^12576667521 is an apocalyptic number.

12576667521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12576667521 is a deficient number, since it is larger than the sum of its proper divisors (6353433151).

12576667521 is a wasteful number, since it uses less digits than its factorization.

12576667521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936453 (or 936442 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 48.

The spelling of 12576667521 in words is "twelve billion, five hundred seventy-six million, six hundred sixty-seven thousand, five hundred twenty-one".