12117255416 has 64 divisors (see below), whose sum is σ = 27160358400. Its totient is φ = 4955246208.

The previous prime is 12117255401. The next prime is 12117255421. The reversal of 12117255416 is 61455271121.

It is a congruent number.

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, 528446 + ... + 550898.

It is an arithmetic number, because the mean of its divisors is an integer number (424380600).

Almost surely, 2^12117255416 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 12117255416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13580179200).

12117255416 is an abundant number, since it is smaller than the sum of its proper divisors (15043102984).

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

12117255416 is a wasteful number, since it uses less digits than its factorization.

12117255416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22908 (or 22904 counting only the distinct ones).

The product of its digits is 16800, while the sum is 35.

The spelling of 12117255416 in words is "twelve billion, one hundred seventeen million, two hundred fifty-five thousand, four hundred sixteen".