12652444621 has 2 divisors, whose sum is σ = 12652444622. Its totient is φ = 12652444620.

The previous prime is 12652444591. The next prime is 12652444639. The reversal of 12652444621 is 12644425621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8532216900 + 4120227721 = 92370^2 + 64189^2 .

It is a cyclic number.

It is not a de Polignac number, because 12652444621 - 2¹¹ = 12652442573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12652441621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6326222310 + 6326222311.

It is an arithmetic number, because the mean of its divisors is an integer number (6326222311).

Almost surely, 2^12652444621 is an apocalyptic number.

It is an amenable number.

12652444621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12652444621 is an equidigital number, since it uses as much as digits as its factorization.

12652444621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 37.

The spelling of 12652444621 in words is "twelve billion, six hundred fifty-two million, four hundred forty-four thousand, six hundred twenty-one".