216443141024065 has 4 divisors (see below), whose sum is σ = 259731769228884. Its totient is φ = 173154512819248.

The previous prime is 216443141024059. The next prime is 216443141024111. The reversal of 216443141024065 is 560420141344612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46267802577936 + 170175338446129 = 6802044^2 + 13045127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216443141024065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21644314102402 + ... + 21644314102411.

It is an arithmetic number, because the mean of its divisors is an integer number (64932942307221).

Almost surely, 2^{216443141024065} is an apocalyptic number.

It is an amenable number.

216443141024065 is a deficient number, since it is larger than the sum of its proper divisors (43288628204819).

216443141024065 is an equidigital number, since it uses as much as digits as its factorization.

216443141024065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43288628204818.

The product of its (nonzero) digits is 552960, while the sum is 43.

Adding to 216443141024065 its reverse (560420141344612), we get a palindrome (776863282368677).

The spelling of 216443141024065 in words is "two hundred sixteen trillion, four hundred forty-three billion, one hundred forty-one million, twenty-four thousand, sixty-five".