12170515056 has 160 divisors (see below), whose sum is σ = 37942095360. Its totient is φ = 3283918848.

The previous prime is 12170515039. The next prime is 12170515061. The reversal of 12170515056 is 65051507121.

It is a happy number.

12170515056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2148580 + ... + 2154236.

It is an arithmetic number, because the mean of its divisors is an integer number (237138096).

Almost surely, 2^12170515056 is an apocalyptic number.

12170515056 is a gapful number since it is divisible by the number (16) 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 12170515056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18971047680).

12170515056 is an abundant number, since it is smaller than the sum of its proper divisors (25771580304).

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

12170515056 is a wasteful number, since it uses less digits than its factorization.

12170515056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6031 (or 6025 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 33.

The spelling of 12170515056 in words is "twelve billion, one hundred seventy million, five hundred fifteen thousand, fifty-six".