12541842865 has 8 divisors (see below), whose sum is σ = 15108774120. Its totient is φ = 9994432512.

The previous prime is 12541842851. The next prime is 12541842893. The reversal of 12541842865 is 56824814521.

It can be written as a sum of positive squares in 4 ways, for example, as 2500400016 + 10041442849 = 50004^2 + 100207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12541842865 - 2¹⁵ = 12541810097 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 4878810 + ... + 4881379.

It is an arithmetic number, because the mean of its divisors is an integer number (1888596765).

Almost surely, 2^12541842865 is an apocalyptic number.

It is an amenable number.

12541842865 is a deficient number, since it is larger than the sum of its proper divisors (2566931255).

12541842865 is an equidigital number, since it uses as much as digits as its factorization.

12541842865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9760451.

The product of its digits is 614400, while the sum is 46.

The spelling of 12541842865 in words is "twelve billion, five hundred forty-one million, eight hundred forty-two thousand, eight hundred sixty-five".