2938657568393 has 4 divisors (see below), whose sum is σ = 2940958789380. Its totient is φ = 2936356347408.

The previous prime is 2938657568387. The next prime is 2938657568411. The reversal of 2938657568393 is 3938657568392.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2258011118224 + 680646450169 = 1502668^2 + 825013^2 .

It is a cyclic number.

It is not a de Polignac number, because 2938657568393 - 2⁸ = 2938657568137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2938657568393.

It is not an unprimeable number, because it can be changed into a prime (2938657568323) 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, 1150608578 + ... + 1150611131.

It is an arithmetic number, because the mean of its divisors is an integer number (735239697345).

Almost surely, 2^{2938657568393} is an apocalyptic number.

It is an amenable number.

2938657568393 is a deficient number, since it is larger than the sum of its proper divisors (2301220987).

2938657568393 is a wasteful number, since it uses less digits than its factorization.

2938657568393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301220986.

The product of its digits is 1763596800, while the sum is 74.

Subtracting 2938657568393 from its reverse (3938657568392), we obtain a palindrome (999999999999).

The spelling of 2938657568393 in words is "two trillion, nine hundred thirty-eight billion, six hundred fifty-seven million, five hundred sixty-eight thousand, three hundred ninety-three".