12568669865 has 8 divisors (see below), whose sum is σ = 15165733128. Its totient is φ = 9999383040.

The previous prime is 12568669793. The next prime is 12568669913. The reversal of 12568669865 is 56896686521.

It can be written as a sum of positive squares in 4 ways, for example, as 384042409 + 12184627456 = 19597^2 + 110384^2 .

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

It is not a de Polignac number, because 12568669865 - 2²⁶ = 12501561001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12568669798 and 12568669807.

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, 6943112 + ... + 6944921.

It is an arithmetic number, because the mean of its divisors is an integer number (1895716641).

Almost surely, 2^12568669865 is an apocalyptic number.

It is an amenable number.

12568669865 is a deficient number, since it is larger than the sum of its proper divisors (2597063263).

12568669865 is a wasteful number, since it uses less digits than its factorization.

12568669865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13888219.

The product of its digits is 37324800, while the sum is 62.

The spelling of 12568669865 in words is "twelve billion, five hundred sixty-eight million, six hundred sixty-nine thousand, eight hundred sixty-five".