12144501638 has 16 divisors (see below), whose sum is σ = 18752554944. Its totient is φ = 5894412480.

The previous prime is 12144501631. The next prime is 12144501659. The reversal of 12144501638 is 83610544121.

It is a junction number, because it is equal to n+sod(n) for n = 12144501598 and 12144501607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144501631) 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 7 ways as a sum of consecutive naturals, for example, 158495 + ... + 222282.

It is an arithmetic number, because the mean of its divisors is an integer number (1172034684).

Almost surely, 2^12144501638 is an apocalyptic number.

12144501638 is a deficient number, since it is larger than the sum of its proper divisors (6608053306).

12144501638 is a wasteful number, since it uses less digits than its factorization.

12144501638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381247.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 12144501638 in words is "twelve billion, one hundred forty-four million, five hundred one thousand, six hundred thirty-eight".