216204563221653 has 8 divisors (see below), whose sum is σ = 288272819526400. Its totient is φ = 144136341199008.

The previous prime is 216204563221607. The next prime is 216204563221663. The reversal of 216204563221653 is 356122365402612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216204563221653 - 2¹⁰ = 216204563220629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216204563221663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17306268 + ... + 27053946.

It is an arithmetic number, because the mean of its divisors is an integer number (36034102440800).

Almost surely, 2^{216204563221653} is an apocalyptic number.

It is an amenable number.

216204563221653 is a deficient number, since it is larger than the sum of its proper divisors (72068256304747).

216204563221653 is an equidigital number, since it uses as much as digits as its factorization.

216204563221653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17141051.

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 216204563221653 in words is "two hundred sixteen trillion, two hundred four billion, five hundred sixty-three million, two hundred twenty-one thousand, six hundred fifty-three".