12621061547 has 2 divisors, whose sum is σ = 12621061548. Its totient is φ = 12621061546.

The previous prime is 12621061507. The next prime is 12621061553. The reversal of 12621061547 is 74516012621.

12621061547 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12621061547 - 2¹⁰ = 12621060523 is a prime.

It is not a weakly prime, because it can be changed into another prime (12621061507) 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 as a sum of consecutive naturals, namely, 6310530773 + 6310530774.

It is an arithmetic number, because the mean of its divisors is an integer number (6310530774).

Almost surely, 2^12621061547 is an apocalyptic number.

12621061547 is a deficient number, since it is larger than the sum of its proper divisors (1).

12621061547 is an equidigital number, since it uses as much as digits as its factorization.

12621061547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 12621061547 in words is "twelve billion, six hundred twenty-one million, sixty-one thousand, five hundred forty-seven".