216324676561 has 8 divisors (see below), whose sum is σ = 247276220544. Its totient is φ = 185385137280.

The previous prime is 216324676517. The next prime is 216324676573. The reversal of 216324676561 is 165676423612.

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

It is not a de Polignac number, because 216324676561 - 2¹⁵ = 216324643793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216324670561) 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, 2962525 + ... + 3034666.

It is an arithmetic number, because the mean of its divisors is an integer number (30909527568).

Almost surely, 2^216324676561 is an apocalyptic number.

It is an amenable number.

216324676561 is a deficient number, since it is larger than the sum of its proper divisors (30951543983).

216324676561 is an equidigital number, since it uses as much as digits as its factorization.

216324676561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002351.

The product of its digits is 2177280, while the sum is 49.

The spelling of 216324676561 in words is "two hundred sixteen billion, three hundred twenty-four million, six hundred seventy-six thousand, five hundred sixty-one".