12454123553 has 4 divisors (see below), whose sum is σ = 13109603760. Its totient is φ = 11798643348.

The previous prime is 12454123531. The next prime is 12454123571. The reversal of 12454123553 is 35532145421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35532145421 = 89 ⋅399237589.

It is a cyclic number.

It is not a de Polignac number, because 12454123553 - 2²² = 12449929249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12454129553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327740075 + ... + 327740112.

It is an arithmetic number, because the mean of its divisors is an integer number (3277400940).

Almost surely, 2^12454123553 is an apocalyptic number.

It is an amenable number.

12454123553 is a deficient number, since it is larger than the sum of its proper divisors (655480207).

12454123553 is an equidigital number, since it uses as much as digits as its factorization.

12454123553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655480206.

The product of its digits is 72000, while the sum is 35.

Adding to 12454123553 its reverse (35532145421), we get a palindrome (47986268974).

The spelling of 12454123553 in words is "twelve billion, four hundred fifty-four million, one hundred twenty-three thousand, five hundred fifty-three".