12840764544 has 128 divisors (see below), whose sum is σ = 38079864000. Its totient is φ = 4259727360.

The previous prime is 12840764537. The next prime is 12840764561. The reversal of 12840764544 is 44546704821.

12840764544 is a `hidden beast` number, since 1 + 2 + 8 + 40 + 7 + 64 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 12840764544.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720412 + ... + 738020.

Almost surely, 2^12840764544 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 12840764544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19039932000).

12840764544 is an abundant number, since it is smaller than the sum of its proper divisors (25239099456).

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

12840764544 is a wasteful number, since it uses less digits than its factorization.

12840764544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17843 (or 17825 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 12840764544 in words is "twelve billion, eight hundred forty million, seven hundred sixty-four thousand, five hundred forty-four".