12117653828 has 48 divisors (see below), whose sum is σ = 25168993920. Its totient is φ = 4994605056.

The previous prime is 12117653827. The next prime is 12117653831. The reversal of 12117653828 is 82835671121.

It is not an unprimeable number, because it can be changed into a prime (12117653827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179651 + ... + 237717.

It is an arithmetic number, because the mean of its divisors is an integer number (524354040).

Almost surely, 2^12117653828 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 12117653828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12584496960).

12117653828 is an abundant number, since it is smaller than the sum of its proper divisors (13051340092).

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

12117653828 is a wasteful number, since it uses less digits than its factorization.

12117653828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58364 (or 58362 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The spelling of 12117653828 in words is "twelve billion, one hundred seventeen million, six hundred fifty-three thousand, eight hundred twenty-eight".