12154504529 has 4 divisors (see below), whose sum is σ = 12274846260. Its totient is φ = 12034162800.

The previous prime is 12154504517. The next prime is 12154504543. The reversal of 12154504529 is 92540545121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12028166929 + 126337600 = 109673^2 + 11240^2 .

It is a cyclic number.

It is not a de Polignac number, because 12154504529 - 2²⁰ = 12153455953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12154504492 and 12154504501.

It is not an unprimeable number, because it can be changed into a prime (12154504559) 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, 60170714 + ... + 60170915.

It is an arithmetic number, because the mean of its divisors is an integer number (3068711565).

Almost surely, 2^12154504529 is an apocalyptic number.

It is an amenable number.

12154504529 is a deficient number, since it is larger than the sum of its proper divisors (120341731).

12154504529 is a wasteful number, since it uses less digits than its factorization.

12154504529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120341730.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 12154504529 in words is "twelve billion, one hundred fifty-four million, five hundred four thousand, five hundred twenty-nine".