12245534140 has 72 divisors (see below), whose sum is σ = 30222717840. Its totient is φ = 4155153408.

The previous prime is 12245534137. The next prime is 12245534141. The reversal of 12245534140 is 4143554221.

12245534140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12245534141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30651 + ... + 159469.

It is an arithmetic number, because the mean of its divisors is an integer number (419759970).

Almost surely, 2^12245534140 is an apocalyptic number.

12245534140 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 12245534140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15111358920).

12245534140 is an abundant number, since it is smaller than the sum of its proper divisors (17977183700).

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

12245534140 is a wasteful number, since it uses less digits than its factorization.

12245534140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128939 (or 128930 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 12245534140 in words is "twelve billion, two hundred forty-five million, five hundred thirty-four thousand, one hundred forty".