2938665668393 has 8 divisors (see below), whose sum is σ = 3616819284288. Its totient is φ = 2325098111184.

The previous prime is 2938665668369. The next prime is 2938665668483. The reversal of 2938665668393 is 3938665668392.

It is a happy number.

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 2938665668393 - 2¹⁴ = 2938665652009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2938665668393.

It is not an unprimeable number, because it can be changed into a prime (2938665668293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16146514571 + ... + 16146514752.

It is an arithmetic number, because the mean of its divisors is an integer number (452102410536).

Almost surely, 2^{2938665668393} is an apocalyptic number.

It is an amenable number.

2938665668393 is a deficient number, since it is larger than the sum of its proper divisors (678153615895).

2938665668393 is a wasteful number, since it uses less digits than its factorization.

2938665668393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32293029343.

The product of its digits is 1813985280, while the sum is 74.

Subtracting 2938665668393 from its reverse (3938665668392), we obtain a palindrome (999999999999).

The spelling of 2938665668393 in words is "two trillion, nine hundred thirty-eight billion, six hundred sixty-five million, six hundred sixty-eight thousand, three hundred ninety-three".