12544954489 has 2 divisors, whose sum is σ = 12544954490. Its totient is φ = 12544954488.

The previous prime is 12544954453. The next prime is 12544954511. The reversal of 12544954489 is 98445944521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6854515264 + 5690439225 = 82792^2 + 75435^2 .

It is a cyclic number.

It is not a de Polignac number, because 12544954489 - 2⁷ = 12544954361 is a prime.

It is a super-2 number, since 2×12544954489² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12544952489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272477244 + 6272477245.

It is an arithmetic number, because the mean of its divisors is an integer number (6272477245).

Almost surely, 2^12544954489 is an apocalyptic number.

It is an amenable number.

12544954489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12544954489 is an equidigital number, since it uses as much as digits as its factorization.

12544954489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8294400, while the sum is 55.

The spelling of 12544954489 in words is "twelve billion, five hundred forty-four million, nine hundred fifty-four thousand, four hundred eighty-nine".