12091604172 has 48 divisors (see below), whose sum is σ = 29246972160. Its totient is φ = 3883505472.

The previous prime is 12091604113. The next prime is 12091604177. The reversal of 12091604172 is 27140619021.

It is a happy number.

It is a super-3 number, since 3×12091604172³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12091604177) 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, 133803 + ... + 205149.

It is an arithmetic number, because the mean of its divisors is an integer number (609311920).

Almost surely, 2^12091604172 is an apocalyptic number.

12091604172 is a gapful number since it is divisible by the number (12) 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 12091604172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14623486080).

12091604172 is an abundant number, since it is smaller than the sum of its proper divisors (17155367988).

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

12091604172 is a wasteful number, since it uses less digits than its factorization.

12091604172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71870 (or 71868 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The spelling of 12091604172 in words is "twelve billion, ninety-one million, six hundred four thousand, one hundred seventy-two".