12156947328 has 64 divisors (see below), whose sum is σ = 33164683920. Its totient is φ = 3942789120.

The previous prime is 12156947293. The next prime is 12156947389. The reversal of 12156947328 is 82374965121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 413613 + ... + 442028.

Almost surely, 2^12156947328 is an apocalyptic number.

It is an amenable number.

12156947328 is an abundant number, since it is smaller than the sum of its proper divisors (21007736592).

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

12156947328 is an equidigital number, since it uses as much as digits as its factorization.

12156947328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855695 (or 855683 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The spelling of 12156947328 in words is "twelve billion, one hundred fifty-six million, nine hundred forty-seven thousand, three hundred twenty-eight".