12156582320 has 20 divisors (see below), whose sum is σ = 28264054080. Its totient is φ = 4862632896.

The previous prime is 12156582293. The next prime is 12156582359. The reversal of 12156582320 is 2328565121.

12156582320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 75978560 + ... + 75978719.

It is an arithmetic number, because the mean of its divisors is an integer number (1413202704).

Almost surely, 2^12156582320 is an apocalyptic number.

12156582320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12156582320 is an abundant number, since it is smaller than the sum of its proper divisors (16107471760).

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

12156582320 is a wasteful number, since it uses less digits than its factorization.

12156582320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151957292 (or 151957286 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 12156582320 in words is "twelve billion, one hundred fifty-six million, five hundred eighty-two thousand, three hundred twenty".