12289278447 has 40 divisors (see below), whose sum is σ = 19018783872. Its totient is φ = 7899897600.

The previous prime is 12289278437. The next prime is 12289278503. The reversal of 12289278447 is 74487298221.

12289278447 is a `hidden beast` number, since 122 + 8 + 9 + 2 + 78 + 447 = 666.

It is not a de Polignac number, because 12289278447 - 2¹⁸ = 12289016303 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12289278393 and 12289278402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289278437) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 696883 + ... + 714299.

Almost surely, 2^12289278447 is an apocalyptic number.

12289278447 is a deficient number, since it is larger than the sum of its proper divisors (6729505425).

12289278447 is a wasteful number, since it uses less digits than its factorization.

12289278447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17741 (or 17732 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 54.

The spelling of 12289278447 in words is "twelve billion, two hundred eighty-nine million, two hundred seventy-eight thousand, four hundred forty-seven".