12446781437 has 2 divisors, whose sum is σ = 12446781438. Its totient is φ = 12446781436.

The previous prime is 12446781409. The next prime is 12446781461. The reversal of 12446781437 is 73418764421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9398526916 + 3048254521 = 96946^2 + 55211^2 .

It is a cyclic number.

It is not a de Polignac number, because 12446781437 - 2⁸ = 12446781181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12446781391 and 12446781400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12446781467) 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, 6223390718 + 6223390719.

It is an arithmetic number, because the mean of its divisors is an integer number (6223390719).

Almost surely, 2^12446781437 is an apocalyptic number.

It is an amenable number.

12446781437 is a deficient number, since it is larger than the sum of its proper divisors (1).

12446781437 is an equidigital number, since it uses as much as digits as its factorization.

12446781437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 47.

The spelling of 12446781437 in words is "twelve billion, four hundred forty-six million, seven hundred eighty-one thousand, four hundred thirty-seven".