12144271545 has 128 divisors (see below), whose sum is σ = 26093813760. Its totient is φ = 5241024000.

The previous prime is 12144271541. The next prime is 12144271567. The reversal of 12144271545 is 54517244121.

12144271545 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 42 + 71 + 545 = 666.

It is not a de Polignac number, because 12144271545 - 2² = 12144271541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12144271541) 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 127 ways as a sum of consecutive naturals, for example, 1196040 + ... + 1206150.

It is an arithmetic number, because the mean of its divisors is an integer number (203857920).

Almost surely, 2^12144271545 is an apocalyptic number.

12144271545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12144271545 is an abundant number, since it is smaller than the sum of its proper divisors (13949542215).

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

12144271545 is a wasteful number, since it uses less digits than its factorization.

12144271545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10204 (or 10198 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The spelling of 12144271545 in words is "twelve billion, one hundred forty-four million, two hundred seventy-one thousand, five hundred forty-five".