12738212243880 has 128 divisors (see below), whose sum is σ = 38435839303680. Its totient is φ = 3377235375360.

The previous prime is 12738212243863. The next prime is 12738212243903. The reversal of 12738212243880 is 8834221283721.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 19481865 + ... + 20125095.

It is an arithmetic number, because the mean of its divisors is an integer number (300279994560).

Almost surely, 2^{12738212243880} is an apocalyptic number.

12738212243880 is a gapful number since it is divisible by the number (10) 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 12738212243880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19217919651840).

12738212243880 is an abundant number, since it is smaller than the sum of its proper divisors (25697627059800).

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

12738212243880 is a wasteful number, since it uses less digits than its factorization.

12738212243880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644199 (or 644195 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 51.

The spelling of 12738212243880 in words is "twelve trillion, seven hundred thirty-eight billion, two hundred twelve million, two hundred forty-three thousand, eight hundred eighty".