12321542545 has 16 divisors (see below), whose sum is σ = 15945431040. Its totient is φ = 9086295744.

The previous prime is 12321542539. The next prime is 12321542567. The reversal of 12321542545 is 54524512321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12321542545 - 2³ = 12321542537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12321542545.

It is an unprimeable number.

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, 85089 + ... + 178558.

It is an arithmetic number, because the mean of its divisors is an integer number (996589440).

Almost surely, 2^12321542545 is an apocalyptic number.

It is an amenable number.

12321542545 is a deficient number, since it is larger than the sum of its proper divisors (3623888495).

12321542545 is a wasteful number, since it uses less digits than its factorization.

12321542545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264384.

The product of its digits is 48000, while the sum is 34.

The spelling of 12321542545 in words is "twelve billion, three hundred twenty-one million, five hundred forty-two thousand, five hundred forty-five".