12860275081856 has 64 divisors (see below), whose sum is σ = 25916810227560. Its totient is φ = 6355875840000.

The previous prime is 12860275081817. The next prime is 12860275081861. The reversal of 12860275081856 is 65818057206821.

It can be written as a sum of positive squares in 4 ways, for example, as 12161847163456 + 698427918400 = 3487384^2 + 835720^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 12860275081795 and 12860275081804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6942140 + ... + 8597316.

Almost surely, 2^{12860275081856} is an apocalyptic number.

12860275081856 is a gapful number since it is divisible by the number (16) 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 12860275081856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12958405113780).

12860275081856 is an abundant number, since it is smaller than the sum of its proper divisors (13056535145704).

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

12860275081856 is a wasteful number, since it uses less digits than its factorization.

12860275081856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655893 (or 1655881 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 59.

The spelling of 12860275081856 in words is "twelve trillion, eight hundred sixty billion, two hundred seventy-five million, eighty-one thousand, eight hundred fifty-six".