12624642621 has 6 divisors (see below), whose sum is σ = 18235594910. Its totient is φ = 8416428408.

The previous prime is 12624642539. The next prime is 12624642623.

12624642621 is a `hidden beast` number, since 1 + 2 + 6 + 2 + 4 + 642 + 6 + 2 + 1 = 666.

12624642621 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 12614434596 + 10208025 = 112314^2 + 3195^2 .

It is not a de Polignac number, because 12624642621 - 2¹⁰ = 12624641597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12624642623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 701369026 + ... + 701369043.

Almost surely, 2^12624642621 is an apocalyptic number.

It is an amenable number.

12624642621 is a deficient number, since it is larger than the sum of its proper divisors (5610952289).

12624642621 is a wasteful number, since it uses less digits than its factorization.

12624642621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402738075 (or 1402738072 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The spelling of 12624642621 in words is "twelve billion, six hundred twenty-four million, six hundred forty-two thousand, six hundred twenty-one".