12154523867 has 16 divisors (see below), whose sum is σ = 12676061952. Its totient is φ = 11646966240.

The previous prime is 12154523851. The next prime is 12154523879. The reversal of 12154523867 is 76832545121.

It is not a de Polignac number, because 12154523867 - 2⁴ = 12154523851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12154523897) 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 15 ways as a sum of consecutive naturals, for example, 387548 + ... + 417734.

It is an arithmetic number, because the mean of its divisors is an integer number (792253872).

Almost surely, 2^12154523867 is an apocalyptic number.

12154523867 is a deficient number, since it is larger than the sum of its proper divisors (521538085).

12154523867 is a wasteful number, since it uses less digits than its factorization.

12154523867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30418.

The product of its digits is 403200, while the sum is 44.

The spelling of 12154523867 in words is "twelve billion, one hundred fifty-four million, five hundred twenty-three thousand, eight hundred sixty-seven".