12154454523 has 24 divisors (see below), whose sum is σ = 17826436368. Its totient is φ = 7978462272.

The previous prime is 12154454483. The next prime is 12154454573. The reversal of 12154454523 is 32545445121.

12154454523 is a `hidden beast` number, since 1 + 2 + 154 + 454 + 52 + 3 = 666.

It is not a de Polignac number, because 12154454523 - 2⁸ = 12154454267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12154454573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2489761 + ... + 2494637.

It is an arithmetic number, because the mean of its divisors is an integer number (742768182).

Almost surely, 2^12154454523 is an apocalyptic number.

12154454523 is a deficient number, since it is larger than the sum of its proper divisors (5671981845).

12154454523 is a wasteful number, since it uses less digits than its factorization.

12154454523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9083 (or 9080 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

Adding to 12154454523 its reverse (32545445121), we get a palindrome (44699899644).

The spelling of 12154454523 in words is "twelve billion, one hundred fifty-four million, four hundred fifty-four thousand, five hundred twenty-three".