12156993216 has 140 divisors (see below), whose sum is σ = 38157244488. Its totient is φ = 3813931008.

The previous prime is 12156993209. The next prime is 12156993221. The reversal of 12156993216 is 61239965121.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19155 + ... + 157101.

Almost surely, 2^12156993216 is an apocalyptic number.

12156993216 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 12156993216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19078622244).

12156993216 is an abundant number, since it is smaller than the sum of its proper divisors (26000251272).

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

12156993216 is a wasteful number, since it uses less digits than its factorization.

12156993216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137988 (or 137969 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The spelling of 12156993216 in words is "twelve billion, one hundred fifty-six million, nine hundred ninety-three thousand, two hundred sixteen".