12855619551744 has 320 divisors, whose sum is σ = 39620811605760. Its totient is φ = 4112142336000.

The previous prime is 12855619551737. The next prime is 12855619551757. The reversal of 12855619551744 is 44715591655821.

12855619551744 is a `hidden beast` number, since 1 + 2 + 8 + 5 + 5 + 6 + 1 + 9 + 551 + 74 + 4 = 666.

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, 34387909 + ... + 34759739.

It is an arithmetic number, because the mean of its divisors is an integer number (123815036268).

Almost surely, 2^{12855619551744} 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 12855619551744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19810405802880).

12855619551744 is an abundant number, since it is smaller than the sum of its proper divisors (26765192054016).

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

12855619551744 is an equidigital number, since it uses as much as digits as its factorization.

12855619551744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371960 (or 371938 counting only the distinct ones).

The product of its digits is 60480000, while the sum is 63.

The spelling of 12855619551744 in words is "twelve trillion, eight hundred fifty-five billion, six hundred nineteen million, five hundred fifty-one thousand, seven hundred forty-four".