12438717841 has 9 divisors (see below), whose sum is σ = 13673658313. Its totient is φ = 11306810020.

The previous prime is 12438717829. The next prime is 12438717901. The reversal of 12438717841 is 14871783421.

The square root of 12438717841 is 111529.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 12438717841 - 2⁷ = 12438717713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12438717791 and 12438717800.

It is not an unprimeable number, because it can be changed into a prime (12438717241) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1221750 + ... + 1231888.

Almost surely, 2^12438717841 is an apocalyptic number.

12438717841 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12438717841 is the 111529-th square number.

12438717841 is the 55765-th centered octagonal number.

It is an amenable number.

12438717841 is a deficient number, since it is larger than the sum of its proper divisors (1234940472).

12438717841 is an frugal number, since it uses more digits than its factorization.

12438717841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20300 (or 10150 counting only the distinct ones).

The product of its digits is 301056, while the sum is 46.

The spelling of 12438717841 in words is "twelve billion, four hundred thirty-eight million, seven hundred seventeen thousand, eight hundred forty-one".