12656981544000 has 896 divisors, whose sum is σ = 43382764339200. Its totient is φ = 3249508147200.

The previous prime is 12656981543977. The next prime is 12656981544013. The reversal of 12656981544000 is 44518965621.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 35256215821 + ... + 35256216179.

Almost surely, 2^{12656981544000} is an apocalyptic number.

12656981544000 is a gapful number since it is divisible by the number (10) 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 12656981544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21691382169600).

12656981544000 is an abundant number, since it is smaller than the sum of its proper divisors (30725782795200).

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

12656981544000 is a wasteful number, since it uses less digits than its factorization.

12656981544000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 12656981544000 in words is "twelve trillion, six hundred fifty-six billion, nine hundred eighty-one million, five hundred forty-four thousand".