12879307778028 has 96 divisors (see below), whose sum is σ = 31946348657664. Its totient is φ = 4024482874368.

The previous prime is 12879307778009. The next prime is 12879307778053. The reversal of 12879307778028 is 82087770397821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59561875 + ... + 59777717.

It is an arithmetic number, because the mean of its divisors is an integer number (332774465184).

Almost surely, 2^{12879307778028} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12879307778028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15973174328832).

12879307778028 is an abundant number, since it is smaller than the sum of its proper divisors (19067040879636).

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

12879307778028 is a wasteful number, since it uses less digits than its factorization.

12879307778028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217031 (or 217029 counting only the distinct ones).

The product of its (nonzero) digits is 132765696, while the sum is 69.

The spelling of 12879307778028 in words is "twelve trillion, eight hundred seventy-nine billion, three hundred seven million, seven hundred seventy-eight thousand, twenty-eight".