6494586921 has 9 divisors (see below), whose sum is σ = 9381419229. Its totient is φ = 4329563436.

The previous prime is 6494586907. The next prime is 6494586953. The reversal of 6494586921 is 1296854946.

The square root of 6494586921 is 80589.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 6494586921 - 2⁷ = 6494586793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6494586971) 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 8 ways as a sum of consecutive naturals, for example, 228336 + ... + 255198.

Almost surely, 2^6494586921 is an apocalyptic number.

6494586921 is the 80589-th square number.

6494586921 is the 40295-th centered octagonal number.

It is an amenable number.

6494586921 is a deficient number, since it is larger than the sum of its proper divisors (2886832308).

6494586921 is an frugal number, since it uses more digits than its factorization.

6494586921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53732 (or 26866 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The cubic root of 6494586921 is about 1865.7373735633.

The spelling of 6494586921 in words is "six billion, four hundred ninety-four million, five hundred eighty-six thousand, nine hundred twenty-one".