5399530568721 has 27 divisors (see below), whose sum is σ = 7819543012827. Its totient is φ = 3590378347680.

The previous prime is 5399530568701. The next prime is 5399530568737. The reversal of 5399530568721 is 1278650359935.

It is a happy number.

The square root of 5399530568721 is 2323689.

It is a perfect power (a square), and thus also a powerful number.

5399530568721 is a `hidden beast` number, since 5 + 3 + 99 + 530 + 5 + 6 + 8 + 7 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2311497570321 + 3088032998400 = 1520361^2 + 1757280^2 .

It is not a de Polignac number, because 5399530568721 - 2⁹ = 5399530568209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5399530568701) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3645867301 + ... + 3645868781.

Almost surely, 2^{5399530568721} is an apocalyptic number.

5399530568721 is the 2323689-th square number.

5399530568721 is the 1161845-th centered octagonal number.

It is an amenable number.

5399530568721 is a deficient number, since it is larger than the sum of its proper divisors (2420012444106).

5399530568721 is an frugal number, since it uses more digits than its factorization.

5399530568721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4014 (or 2007 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 63.

The spelling of 5399530568721 in words is "five trillion, three hundred ninety-nine billion, five hundred thirty million, five hundred sixty-eight thousand, seven hundred twenty-one".