12126856892556 has 192 divisors, whose sum is σ = 35482115379200. Its totient is φ = 3146073613056.

The previous prime is 12126856892471. The next prime is 12126856892587. The reversal of 12126856892556 is 65529865862121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2423955 + ... + 5489013.

Almost surely, 2^{12126856892556} 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 12126856892556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17741057689600).

12126856892556 is an abundant number, since it is smaller than the sum of its proper divisors (23355258486644).

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

12126856892556 is a wasteful number, since it uses less digits than its factorization.

12126856892556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065196 (or 3065194 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 66.

The spelling of 12126856892556 in words is "twelve trillion, one hundred twenty-six billion, eight hundred fifty-six million, eight hundred ninety-two thousand, five hundred fifty-six".