6509218434489 has 9 divisors (see below), whose sum is σ = 9402215461093. Its totient is φ = 4339473853692.

The previous prime is 6509218434431. The next prime is 6509218434617. The reversal of 6509218434489 is 9844348129056.

The square root of 6509218434489 is 2551317.

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

6509218434489 is a `hidden beast` number, since 6 + 5 + 0 + 9 + 2 + 184 + 3 + 448 + 9 = 666.

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

It is not a de Polignac number, because 6509218434489 - 2²³ = 6509210045881 is a prime.

It is a super-2 number, since 2×6509218434489² (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 (6509218434419) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7228732 + ... + 8079170.

Almost surely, 2^{6509218434489} is an apocalyptic number.

6509218434489 is the 2551317-th square number.

6509218434489 is the 1275659-th centered octagonal number.

It is an amenable number.

6509218434489 is a deficient number, since it is larger than the sum of its proper divisors (2892997026604).

6509218434489 is an frugal number, since it uses more digits than its factorization.

6509218434489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700884 (or 850442 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 63.

The spelling of 6509218434489 in words is "six trillion, five hundred nine billion, two hundred eighteen million, four hundred thirty-four thousand, four hundred eighty-nine".