12512777527639 has 2 divisors, whose sum is σ = 12512777527640. Its totient is φ = 12512777527638.

The previous prime is 12512777527637. The next prime is 12512777527667. The reversal of 12512777527639 is 93672577721521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12512777527639 - 2¹ = 12512777527637 is a prime.

Together with 12512777527637, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12512777527631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256388763819 + 6256388763820.

It is an arithmetic number, because the mean of its divisors is an integer number (6256388763820).

Almost surely, 2^{12512777527639} is an apocalyptic number.

12512777527639 is a deficient number, since it is larger than the sum of its proper divisors (1).

12512777527639 is an equidigital number, since it uses as much as digits as its factorization.

12512777527639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77792400, while the sum is 64.

The spelling of 12512777527639 in words is "twelve trillion, five hundred twelve billion, seven hundred seventy-seven million, five hundred twenty-seven thousand, six hundred thirty-nine".