6539847912289 has 4 divisors (see below), whose sum is σ = 6924544848324. Its totient is φ = 6155150976256.

The previous prime is 6539847912287. The next prime is 6539847912337. The reversal of 6539847912289 is 9822197489356.

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 4657861771264 + 1881986141025 = 2158208^2 + 1371855^2 .

It is a cyclic number.

It is not a de Polignac number, because 6539847912289 - 2¹ = 6539847912287 is a prime.

It is a super-2 number, since 2×6539847912289² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6539847912287) 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, 192348467992 + ... + 192348468025.

It is an arithmetic number, because the mean of its divisors is an integer number (1731136212081).

Almost surely, 2^{6539847912289} is an apocalyptic number.

It is an amenable number.

6539847912289 is a deficient number, since it is larger than the sum of its proper divisors (384696936035).

6539847912289 is a wasteful number, since it uses less digits than its factorization.

6539847912289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384696936034.

The product of its digits is 470292480, while the sum is 73.

The spelling of 6539847912289 in words is "six trillion, five hundred thirty-nine billion, eight hundred forty-seven million, nine hundred twelve thousand, two hundred eighty-nine".