1338866699609 has 8 divisors (see below), whose sum is σ = 1346329230792. Its totient is φ = 1331404888320.

The previous prime is 1338866699591. The next prime is 1338866699627. The reversal of 1338866699609 is 9069966688331.

It is an interprime number because it is at equal distance from previous prime (1338866699591) and next prime (1338866699627).

It can be written as a sum of positive squares in 4 ways, for example, as 162828390400 + 1176038309209 = 403520^2 + 1084453^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338866699609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1338866699629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3793697 + ... + 4131569.

It is an arithmetic number, because the mean of its divisors is an integer number (168291153849).

Almost surely, 2^{1338866699609} is an apocalyptic number.

It is an amenable number.

1338866699609 is a deficient number, since it is larger than the sum of its proper divisors (7462531183).

1338866699609 is a wasteful number, since it uses less digits than its factorization.

1338866699609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359947.

The product of its (nonzero) digits is 544195584, while the sum is 74.

The spelling of 1338866699609 in words is "one trillion, three hundred thirty-eight billion, eight hundred sixty-six million, six hundred ninety-nine thousand, six hundred nine".