6489752481 has 15 divisors (see below), whose sum is σ = 9695651713. Its totient is φ = 4326018300.

The previous prime is 6489752453. The next prime is 6489752491. The reversal of 6489752481 is 1842579846.

It is a happy number.

The square root of 6489752481 is 80559.

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

6489752481 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6489752481 - 2⁵ = 6489752449 is a prime.

It is a super-2 number, since 2×6489752481² = 84233774529291310722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6489752441) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 720556 + ... + 729506.

Almost surely, 2^6489752481 is an apocalyptic number.

6489752481 is the 80559-th square number.

6489752481 is the 40280-th centered octagonal number.

It is an amenable number.

6489752481 is a deficient number, since it is larger than the sum of its proper divisors (3205899232).

6489752481 is an frugal number, since it uses more digits than its factorization.

6489752481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17914 (or 8954 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The cubic root of 6489752481 is about 1865.2743195115.

It can be divided in two parts, 648 and 9752481, that added together give a square (9753129 = 3123²).

The spelling of 6489752481 in words is "six billion, four hundred eighty-nine million, seven hundred fifty-two thousand, four hundred eighty-one".