12642604529 has 2 divisors, whose sum is σ = 12642604530. Its totient is φ = 12642604528.

The previous prime is 12642604517. The next prime is 12642604631. The reversal of 12642604529 is 92540624621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8386346929 + 4256257600 = 91577^2 + 65240^2 .

It is a cyclic number.

It is not a de Polignac number, because 12642604529 - 2¹² = 12642600433 is a prime.

It is not a weakly prime, because it can be changed into another prime (12642654529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6321302264 + 6321302265.

It is an arithmetic number, because the mean of its divisors is an integer number (6321302265).

Almost surely, 2^12642604529 is an apocalyptic number.

It is an amenable number.

12642604529 is a deficient number, since it is larger than the sum of its proper divisors (1).

12642604529 is an equidigital number, since it uses as much as digits as its factorization.

12642604529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 12642604529 in words is "twelve billion, six hundred forty-two million, six hundred four thousand, five hundred twenty-nine".