12856612384840 has 128 divisors (see below), whose sum is σ = 33624859968000. Its totient is φ = 4333258137600.

The previous prime is 12856612384817. The next prime is 12856612384871. The reversal of 12856612384840 is 4848321665821.

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 31 ways as a sum of consecutive naturals, for example, 2458365 + ... + 5635315.

It is an arithmetic number, because the mean of its divisors is an integer number (262694218500).

Almost surely, 2^{12856612384840} is an apocalyptic number.

12856612384840 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 12856612384840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16812429984000).

12856612384840 is an abundant number, since it is smaller than the sum of its proper divisors (20768247583160).

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

12856612384840 is a wasteful number, since it uses less digits than its factorization.

12856612384840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177215 (or 3177211 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 58.

The spelling of 12856612384840 in words is "twelve trillion, eight hundred fifty-six billion, six hundred twelve million, three hundred eighty-four thousand, eight hundred forty".