12781970473 has 2 divisors, whose sum is σ = 12781970474. Its totient is φ = 12781970472.

The previous prime is 12781970459. The next prime is 12781970497. The reversal of 12781970473 is 37407918721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12426006784 + 355963689 = 111472^2 + 18867^2 .

It is a cyclic number.

It is not a de Polignac number, because 12781970473 - 2²¹ = 12779873321 is a prime.

It is not a weakly prime, because it can be changed into another prime (12781940473) 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, 6390985236 + 6390985237.

It is an arithmetic number, because the mean of its divisors is an integer number (6390985237).

Almost surely, 2^12781970473 is an apocalyptic number.

It is an amenable number.

12781970473 is a deficient number, since it is larger than the sum of its proper divisors (1).

12781970473 is an equidigital number, since it uses as much as digits as its factorization.

12781970473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 49.

The spelling of 12781970473 in words is "twelve billion, seven hundred eighty-one million, nine hundred seventy thousand, four hundred seventy-three".