12778425884 has 48 divisors (see below), whose sum is σ = 26206407360. Its totient is φ = 5337546240.

The previous prime is 12778425841. The next prime is 12778425899. The reversal of 12778425884 is 48852487721.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 1268114 + ... + 1278150.

It is an arithmetic number, because the mean of its divisors is an integer number (545966820).

Almost surely, 2^12778425884 is an apocalyptic number.

12778425884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12778425884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13103203680).

12778425884 is an abundant number, since it is smaller than the sum of its proper divisors (13427981476).

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

12778425884 is a wasteful number, since it uses less digits than its factorization.

12778425884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11198 (or 11196 counting only the distinct ones).

The product of its digits is 8028160, while the sum is 56.

The spelling of 12778425884 in words is "twelve billion, seven hundred seventy-eight million, four hundred twenty-five thousand, eight hundred eighty-four".