12555437564808 has 128 divisors (see below), whose sum is σ = 35645932224000. Its totient is φ = 4092918197760.

The previous prime is 12555437564801. The next prime is 12555437564819. The reversal of 12555437564808 is 80846573455521.

12555437564808 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 543 + 7 + 5 + 6 + 4 + 80 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (12555437564801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12606198 + ... + 13565658.

It is an arithmetic number, because the mean of its divisors is an integer number (278483845500).

Almost surely, 2^{12555437564808} is an apocalyptic number.

12555437564808 is a gapful number since it is divisible by the number (18) 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 12555437564808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17822966112000).

12555437564808 is an abundant number, since it is smaller than the sum of its proper divisors (23090494659192).

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

12555437564808 is a wasteful number, since it uses less digits than its factorization.

12555437564808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960812 (or 960802 counting only the distinct ones).

The product of its (nonzero) digits is 161280000, while the sum is 63.

The spelling of 12555437564808 in words is "twelve trillion, five hundred fifty-five billion, four hundred thirty-seven million, five hundred sixty-four thousand, eight hundred eight".