6546589921 has 3 divisors (see below), whose sum is σ = 6546670833. Its totient is φ = 6546509010.

The previous prime is 6546589867. The next prime is 6546589927. The reversal of 6546589921 is 1299856456.

The square root of 6546589921 is 80911.

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 6546589921 - 2¹³ = 6546581729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6546589927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40456 + ... + 121366.

It is an arithmetic number, because the mean of its divisors is an integer number (2182223611).

Almost surely, 2^6546589921 is an apocalyptic number.

6546589921 is the 80911-st square number.

6546589921 is the 40456-th centered octagonal number.

It is an amenable number.

6546589921 is a deficient number, since it is larger than the sum of its proper divisors (80912).

6546589921 is an frugal number, since it uses more digits than its factorization.

6546589921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161822 (or 80911 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 55.

The cubic root of 6546589921 is about 1870.7038749781.

The spelling of 6546589921 in words is "six billion, five hundred forty-six million, five hundred eighty-nine thousand, nine hundred twenty-one".