12767881878 has 32 divisors (see below), whose sum is σ = 28382313600. Its totient is φ = 4254574248.

The previous prime is 12767881853. The next prime is 12767881897. The reversal of 12767881878 is 87818876721.

12767881878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 136053 + ... + 209871.

It is an arithmetic number, because the mean of its divisors is an integer number (886947300).

Almost surely, 2^12767881878 is an apocalyptic number.

12767881878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12767881878 is an abundant number, since it is smaller than the sum of its proper divisors (15614431722).

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

12767881878 is a wasteful number, since it uses less digits than its factorization.

12767881878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77033 (or 77027 counting only the distinct ones).

The product of its digits is 16859136, while the sum is 63.

The spelling of 12767881878 in words is "twelve billion, seven hundred sixty-seven million, eight hundred eighty-one thousand, eight hundred seventy-eight".