12155145216 has 88 divisors (see below), whose sum is σ = 32701561920. Its totient is φ = 4013740032.

The previous prime is 12155145203. The next prime is 12155145251. The reversal of 12155145216 is 61254155121.

It is a happy 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, 310215 + ... + 347193.

Almost surely, 2^12155145216 is an apocalyptic number.

12155145216 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 12155145216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16350780960).

12155145216 is an abundant number, since it is smaller than the sum of its proper divisors (20546416704).

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

12155145216 is a wasteful number, since it uses less digits than its factorization.

12155145216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37109 (or 37091 counting only the distinct ones).

The product of its digits is 12000, while the sum is 33.

The spelling of 12155145216 in words is "twelve billion, one hundred fifty-five million, one hundred forty-five thousand, two hundred sixteen".