12156247744 has 112 divisors (see below), whose sum is σ = 25355068416. Its totient is φ = 5775897600.

The previous prime is 12156247739. The next prime is 12156247787. The reversal of 12156247744 is 44774265121.

It is a self number, because there is not a number n which added to its sum of digits gives 12156247744.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36725659 + ... + 36725989.

Almost surely, 2^12156247744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12156247744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12677534208).

12156247744 is an abundant number, since it is smaller than the sum of its proper divisors (13198820672).

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

12156247744 is a wasteful number, since it uses less digits than its factorization.

12156247744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 644 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The spelling of 12156247744 in words is "twelve billion, one hundred fifty-six million, two hundred forty-seven thousand, seven hundred forty-four".