12281278275 has 72 divisors (see below), whose sum is σ = 25238232864. Its totient is φ = 5592268800.

The previous prime is 12281278223. The next prime is 12281278307. The reversal of 12281278275 is 57287218221.

12281278275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12281278275 - 2⁷ = 12281278147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12281278275.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 389605 + ... + 419945.

It is an arithmetic number, because the mean of its divisors is an integer number (350531012).

Almost surely, 2^12281278275 is an apocalyptic number.

12281278275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12281278275 is an abundant number, since it is smaller than the sum of its proper divisors (12956954589).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12281278275 is a wasteful number, since it uses less digits than its factorization.

12281278275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30621 (or 30613 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The spelling of 12281278275 in words is "twelve billion, two hundred eighty-one million, two hundred seventy-eight thousand, two hundred seventy-five".