12838240865 has 8 divisors (see below), whose sum is σ = 15658444968. Its totient is φ = 10102222080.

The previous prime is 12838240841. The next prime is 12838240873. The reversal of 12838240865 is 56804283821.

It can be written as a sum of positive squares in 4 ways, for example, as 181090849 + 12657150016 = 13457^2 + 112504^2 .

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

It is not a de Polignac number, because 12838240865 - 2⁶ = 12838240801 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21045992 + ... + 21046601.

It is an arithmetic number, because the mean of its divisors is an integer number (1957305621).

Almost surely, 2^12838240865 is an apocalyptic number.

It is an amenable number.

12838240865 is a deficient number, since it is larger than the sum of its proper divisors (2820204103).

12838240865 is an equidigital number, since it uses as much as digits as its factorization.

12838240865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42092659.

The product of its (nonzero) digits is 737280, while the sum is 47.

The spelling of 12838240865 in words is "twelve billion, eight hundred thirty-eight million, two hundred forty thousand, eight hundred sixty-five".