12278126772 has 30 divisors (see below), whose sum is σ = 32097449538. Its totient is φ = 4092708816.

The previous prime is 12278126747. The next prime is 12278126821. The reversal of 12278126772 is 27762187221.

It can be written as a sum of positive squares in only one way, i.e., 8700412176 + 3577714596 = 93276^2 + 59814^2 .

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 18947403 + ... + 18948050.

Almost surely, 2^12278126772 is an apocalyptic number.

12278126772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12278126772 is an abundant number, since it is smaller than the sum of its proper divisors (19819322766).

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

12278126772 is a wasteful number, since it uses less digits than its factorization.

12278126772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37895469 (or 37895458 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The spelling of 12278126772 in words is "twelve billion, two hundred seventy-eight million, one hundred twenty-six thousand, seven hundred seventy-two".