65016330289 has 27 divisors (see below), whose sum is σ = 70643124993. Its totient is φ = 59825131392.

The previous prime is 65016330251. The next prime is 65016330293. The reversal of 65016330289 is 98203361056.

The square root of 65016330289 is 254983.

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

It can be written as a sum of positive squares in 4 ways, for example, as 16290182689 + 48726147600 = 127633^2 + 220740^2 .

It is not a de Polignac number, because 65016330289 - 2¹⁹ = 65015806001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65016330389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 229739542 + ... + 229739824.

Almost surely, 2^65016330289 is an apocalyptic number.

65016330289 is the 254983-rd square number.

65016330289 is the 127492-nd centered octagonal number.

It is an amenable number.

65016330289 is a deficient number, since it is larger than the sum of its proper divisors (5626794704).

65016330289 is an frugal number, since it uses more digits than its factorization.

65016330289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 65016330289 in words is "sixty-five billion, sixteen million, three hundred thirty thousand, two hundred eighty-nine".