12278261508 has 24 divisors (see below), whose sum is σ = 28820834112. Its totient is φ = 4068245664.

The previous prime is 12278261503. The next prime is 12278261521. The reversal of 12278261508 is 80516287221.

It is a self number, because there is not a number n which added to its sum of digits gives 12278261508.

It is not an unprimeable number, because it can be changed into a prime (12278261503) 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 7 ways as a sum of consecutive naturals, for example, 3061435 + ... + 3065442.

It is an arithmetic number, because the mean of its divisors is an integer number (1200868088).

Almost surely, 2^12278261508 is an apocalyptic number.

It is an amenable number.

12278261508 is an abundant number, since it is smaller than the sum of its proper divisors (16542572604).

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

12278261508 is a wasteful number, since it uses less digits than its factorization.

12278261508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6127051 (or 6127049 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 12278261508 in words is "twelve billion, two hundred seventy-eight million, two hundred sixty-one thousand, five hundred eight".