6537189589549 has 4 divisors (see below), whose sum is σ = 6540055523260. Its totient is φ = 6534323655840.

The previous prime is 6537189589519. The next prime is 6537189589561. The reversal of 6537189589549 is 9459859817356.

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 2757691996900 + 3779497592649 = 1660630^2 + 1944093^2 .

It is a cyclic number.

It is not a de Polignac number, because 6537189589549 - 2¹⁹ = 6537189065261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6537189589519) 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, 1432963434 + ... + 1432967995.

It is an arithmetic number, because the mean of its divisors is an integer number (1635013880815).

Almost surely, 2^{6537189589549} is an apocalyptic number.

It is an amenable number.

6537189589549 is a deficient number, since it is larger than the sum of its proper divisors (2865933711).

6537189589549 is a wasteful number, since it uses less digits than its factorization.

6537189589549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2865933710.

The product of its digits is 2939328000, while the sum is 79.

The spelling of 6537189589549 in words is "six trillion, five hundred thirty-seven billion, one hundred eighty-nine million, five hundred eighty-nine thousand, five hundred forty-nine".