12135523544000 has 112 divisors (see below), whose sum is σ = 30063825750816. Its totient is φ = 4852561664000.

The previous prime is 12135523543999. The next prime is 12135523544009. The reversal of 12135523544000 is 44532553121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135523544009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23448020 + ... + 23959980.

Almost surely, 2^{12135523544000} is an apocalyptic number.

12135523544000 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 12135523544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15031912875408).

12135523544000 is an abundant number, since it is smaller than the sum of its proper divisors (17928302206816).

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

12135523544000 is an equidigital number, since it uses as much as digits as its factorization.

12135523544000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514951 (or 514931 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 12135523544000 in words is "twelve trillion, one hundred thirty-five billion, five hundred twenty-three million, five hundred forty-four thousand".