12856867523 has 2 divisors, whose sum is σ = 12856867524. Its totient is φ = 12856867522.

The previous prime is 12856867519. The next prime is 12856867549. The reversal of 12856867523 is 32576865821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12856867523 - 2² = 12856867519 is a prime.

It is not a weakly prime, because it can be changed into another prime (12856867223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428433761 + 6428433762.

It is an arithmetic number, because the mean of its divisors is an integer number (6428433762).

Almost surely, 2^12856867523 is an apocalyptic number.

12856867523 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856867523 is an equidigital number, since it uses as much as digits as its factorization.

12856867523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 53.

The spelling of 12856867523 in words is "twelve billion, eight hundred fifty-six million, eight hundred sixty-seven thousand, five hundred twenty-three".