12438489581 has 8 divisors (see below), whose sum is σ = 14222997120. Its totient is φ = 10655877168.

The previous prime is 12438489571. The next prime is 12438489629. The reversal of 12438489581 is 18598483421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12438489581 - 2¹⁸ = 12438227437 is a prime.

It is a super-2 number, since 2×12438489581² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438489521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459686 + ... + 485991.

It is an arithmetic number, because the mean of its divisors is an integer number (1777874640).

Almost surely, 2^12438489581 is an apocalyptic number.

It is an amenable number.

12438489581 is a deficient number, since it is larger than the sum of its proper divisors (1784507539).

12438489581 is an equidigital number, since it uses as much as digits as its factorization.

12438489581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947563.

The product of its digits is 2211840, while the sum is 53.

The spelling of 12438489581 in words is "twelve billion, four hundred thirty-eight million, four hundred eighty-nine thousand, five hundred eighty-one".