12778273121388 has 24 divisors (see below), whose sum is σ = 30094624550592. Its totient is φ = 4219616668944.

The previous prime is 12778273121371. The next prime is 12778273121441. The reversal of 12778273121388 is 88312137287721.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4975961770 + ... + 4975964337.

It is an arithmetic number, because the mean of its divisors is an integer number (1253942689608).

Almost surely, 2^{12778273121388} is an apocalyptic number.

It is an amenable number.

12778273121388 is an abundant number, since it is smaller than the sum of its proper divisors (17316351429204).

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

12778273121388 is a wasteful number, since it uses less digits than its factorization.

12778273121388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9951926221 (or 9951926219 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 60.

The spelling of 12778273121388 in words is "twelve trillion, seven hundred seventy-eight billion, two hundred seventy-three million, one hundred twenty-one thousand, three hundred eighty-eight".