12145471840 has 96 divisors (see below), whose sum is σ = 31980705120. Its totient is φ = 4331741184.

The previous prime is 12145471831. The next prime is 12145471841. The reversal of 12145471840 is 4817454121.

It is a happy number.

12145471840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12145471840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12145471841) 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 15 ways as a sum of consecutive naturals, for example, 65827 + ... + 169186.

It is an arithmetic number, because the mean of its divisors is an integer number (333132345).

Almost surely, 2^12145471840 is an apocalyptic number.

12145471840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12145471840 is an abundant number, since it is smaller than the sum of its proper divisors (19835233280).

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

12145471840 is a wasteful number, since it uses less digits than its factorization.

12145471840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235064 (or 235056 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 12145471840 in words is "twelve billion, one hundred forty-five million, four hundred seventy-one thousand, eight hundred forty".