5398368786721 has 3 divisors (see below), whose sum is σ = 5398371110161. Its totient is φ = 5398366463282.

The previous prime is 5398368786689. The next prime is 5398368786731. The reversal of 5398368786721 is 1276878638935.

The square root of 5398368786721 is 2323439.

It is a perfect power (a square), and thus also a powerful 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 is not a de Polignac number, because 5398368786721 - 2⁵ = 5398368786689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5398368786731) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1161720 + ... + 3485158.

Almost surely, 2^{5398368786721} is an apocalyptic number.

5398368786721 is the 2323439-th square number.

5398368786721 is the 1161720-th centered octagonal number.

It is an amenable number.

5398368786721 is a deficient number, since it is larger than the sum of its proper divisors (2323440).

5398368786721 is an frugal number, since it uses more digits than its factorization.

5398368786721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4646878 (or 2323439 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 73.

The spelling of 5398368786721 in words is "five trillion, three hundred ninety-eight billion, three hundred sixty-eight million, seven hundred eighty-six thousand, seven hundred twenty-one".