12865711909460 has 12 divisors (see below), whose sum is σ = 27017995009908. Its totient is φ = 5146284763776.

The previous prime is 12865711909459. The next prime is 12865711909489. The reversal of 12865711909460 is 6490911756821.

It can be written as a sum of positive squares in 2 ways, for example, as 6833058736144 + 6032653173316 = 2614012^2 + 2456146^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12865711909460.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321642797717 + ... + 321642797756.

It is an arithmetic number, because the mean of its divisors is an integer number (2251499584159).

Almost surely, 2^{12865711909460} is an apocalyptic number.

12865711909460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12865711909460 is an abundant number, since it is smaller than the sum of its proper divisors (14152283100448).

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

12865711909460 is a wasteful number, since it uses less digits than its factorization.

12865711909460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643285595482 (or 643285595480 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 12865711909460 in words is "twelve trillion, eight hundred sixty-five billion, seven hundred eleven million, nine hundred nine thousand, four hundred sixty".