12256655411550 has 192 divisors, whose sum is σ = 33431913934848. Its totient is φ = 2946955440000.

The previous prime is 12256655411449. The next prime is 12256655411569. The reversal of 12256655411550 is 5511455665221.

It is a self number, because there is not a number n which added to its sum of digits gives 12256655411550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 404401497 + ... + 404431803.

It is an arithmetic number, because the mean of its divisors is an integer number (174124551744).

Almost surely, 2^{12256655411550} is an apocalyptic number.

12256655411550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12256655411550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16715956967424).

12256655411550 is an abundant number, since it is smaller than the sum of its proper divisors (21175258523298).

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

12256655411550 is a wasteful number, since it uses less digits than its factorization.

12256655411550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32335 (or 32330 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 48.

The spelling of 12256655411550 in words is "twelve trillion, two hundred fifty-six billion, six hundred fifty-five million, four hundred eleven thousand, five hundred fifty".