12172603520 has 384 divisors, whose sum is σ = 37549872000. Its totient is φ = 3740620800.

The previous prime is 12172603511. The next prime is 12172603523. The reversal of 12172603520 is 2530627121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12172603523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 171445085 + ... + 171445155.

It is an arithmetic number, because the mean of its divisors is an integer number (97786125).

Almost surely, 2^12172603520 is an apocalyptic number.

12172603520 is a gapful number since it is divisible by the number (10) 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 12172603520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18774936000).

12172603520 is an abundant number, since it is smaller than the sum of its proper divisors (25377268480).

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

12172603520 is an frugal number, since it uses more digits than its factorization.

12172603520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The spelling of 12172603520 in words is "twelve billion, one hundred seventy-two million, six hundred three thousand, five hundred twenty".