12781936547 has 2 divisors, whose sum is σ = 12781936548. Its totient is φ = 12781936546.

The previous prime is 12781936529. The next prime is 12781936553. The reversal of 12781936547 is 74563918721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12781936547 - 2⁶ = 12781936483 is a prime.

It is not a weakly prime, because it can be changed into another prime (12781936567) 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, 6390968273 + 6390968274.

It is an arithmetic number, because the mean of its divisors is an integer number (6390968274).

Almost surely, 2^12781936547 is an apocalyptic number.

12781936547 is a deficient number, since it is larger than the sum of its proper divisors (1).

12781936547 is an equidigital number, since it uses as much as digits as its factorization.

12781936547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The spelling of 12781936547 in words is "twelve billion, seven hundred eighty-one million, nine hundred thirty-six thousand, five hundred forty-seven".