12756256544 has 36 divisors (see below), whose sum is σ = 26678085714. Its totient is φ = 6002939904.

The previous prime is 12756256531. The next prime is 12756256549. The reversal of 12756256544 is 44565265721.

It can be written as a sum of positive squares in 3 ways, for example, as 12298810000 + 457446544 = 110900^2 + 21388^2 .

It is not an unprimeable number, because it can be changed into a prime (12756256549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 680429 + ... + 698924.

Almost surely, 2^12756256544 is an apocalyptic number.

It is an amenable number.

12756256544 is an abundant number, since it is smaller than the sum of its proper divisors (13921829170).

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

12756256544 is a wasteful number, since it uses less digits than its factorization.

12756256544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379397 (or 1379372 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 47.

The spelling of 12756256544 in words is "twelve billion, seven hundred fifty-six million, two hundred fifty-six thousand, five hundred forty-four".