12780681448 has 16 divisors (see below), whose sum is σ = 24356627460. Its totient is φ = 6285580800.

The previous prime is 12780681443. The next prime is 12780681521. The reversal of 12780681448 is 84418608721.

It can be written as a sum of positive squares in 2 ways, for example, as 12760413444 + 20268004 = 112962^2 + 4502^2 .

It is a super-3 number, since 3×12780681448³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12780681443) 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 in 3 ways as a sum of consecutive naturals, for example, 13094473 + ... + 13095448.

Almost surely, 2^12780681448 is an apocalyptic number.

It is an amenable number.

12780681448 is a deficient number, since it is larger than the sum of its proper divisors (11575946012).

12780681448 is a wasteful number, since it uses less digits than its factorization.

12780681448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26189988 (or 26189984 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 49.

The spelling of 12780681448 in words is "twelve billion, seven hundred eighty million, six hundred eighty-one thousand, four hundred forty-eight".