1338811189913 has 4 divisors (see below), whose sum is σ = 1338813513828. Its totient is φ = 1338808866000.

The previous prime is 1338811189907. The next prime is 1338811189927. The reversal of 1338811189913 is 3199811188331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 587864158729 + 750947031184 = 766723^2 + 866572^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338811189913 - 2³⁴ = 1321631320729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1338811189213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421295 + ... + 1689707.

It is an arithmetic number, because the mean of its divisors is an integer number (334703378457).

Almost surely, 2^{1338811189913} is an apocalyptic number.

It is an amenable number.

1338811189913 is a deficient number, since it is larger than the sum of its proper divisors (2323915).

1338811189913 is a wasteful number, since it uses less digits than its factorization.

1338811189913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323914.

The product of its digits is 1119744, while the sum is 56.

The spelling of 1338811189913 in words is "one trillion, three hundred thirty-eight billion, eight hundred eleven million, one hundred eighty-nine thousand, nine hundred thirteen".