12389954481 has 24 divisors (see below), whose sum is σ = 19158141184. Its totient is φ = 7993514160.

The previous prime is 12389954453. The next prime is 12389954497. The reversal of 12389954481 is 18445998321.

It is a happy number.

12389954481 is a `hidden beast` number, since 1 + 2 + 3 + 8 + 99 + 544 + 8 + 1 = 666.

It is not a de Polignac number, because 12389954481 - 2⁵ = 12389954449 is a prime.

It is a super-2 number, since 2×12389954481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12389954881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 814846 + ... + 829911.

Almost surely, 2^12389954481 is an apocalyptic number.

It is an amenable number.

12389954481 is a deficient number, since it is larger than the sum of its proper divisors (6768186703).

12389954481 is an equidigital number, since it uses as much as digits as its factorization.

12389954481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644803 (or 1644791 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 12389954481 in words is "twelve billion, three hundred eighty-nine million, nine hundred fifty-four thousand, four hundred eighty-one".