12181501696 has 144 divisors (see below), whose sum is σ = 30310067200. Its totient is φ = 4757336064.

The previous prime is 12181501679. The next prime is 12181501733. The reversal of 12181501696 is 69610518121.

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, 1837075 + ... + 1843693.

Almost surely, 2^12181501696 is an apocalyptic number.

12181501696 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 12181501696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15155033600).

12181501696 is an abundant number, since it is smaller than the sum of its proper divisors (18128565504).

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

12181501696 is an equidigital number, since it uses as much as digits as its factorization.

12181501696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6734 (or 6720 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 12181501696 in words is "twelve billion, one hundred eighty-one million, five hundred one thousand, six hundred ninety-six".