12278438847 has 24 divisors (see below), whose sum is σ = 18658083600. Its totient is φ = 7769397888.

The previous prime is 12278438737. The next prime is 12278438849. The reversal of 12278438847 is 74883487221.

12278438847 is a `hidden beast` number, since 122 + 7 + 8 + 438 + 84 + 7 = 666.

It is not a de Polignac number, because 12278438847 - 2¹⁶ = 12278373311 is a prime.

It is a super-3 number, since 3×12278438847³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12278438793 and 12278438802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12278438849) 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 in 23 ways as a sum of consecutive naturals, for example, 383278 + ... + 414075.

It is an arithmetic number, because the mean of its divisors is an integer number (777420150).

Almost surely, 2^12278438847 is an apocalyptic number.

12278438847 is a deficient number, since it is larger than the sum of its proper divisors (6379644753).

12278438847 is a wasteful number, since it uses less digits than its factorization.

12278438847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797447 (or 797444 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The spelling of 12278438847 in words is "twelve billion, two hundred seventy-eight million, four hundred thirty-eight thousand, eight hundred forty-seven".