216636085 has 8 divisors (see below), whose sum is σ = 260811936. Its totient is φ = 172743120.

The previous prime is 216636047. The next prime is 216636109. The reversal of 216636085 is 580636612.

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

It is not a de Polignac number, because 216636085 - 2⁷ = 216635957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69031 + ... + 72100.

It is an arithmetic number, because the mean of its divisors is an integer number (32601492).

Almost surely, 2^216636085 is an apocalyptic number.

It is an amenable number.

216636085 is a deficient number, since it is larger than the sum of its proper divisors (44175851).

216636085 is a wasteful number, since it uses less digits than its factorization.

216636085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141443.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 216636085 is about 14718.5625996563. The cubic root of 216636085 is about 600.5883903985.

The spelling of 216636085 in words is "two hundred sixteen million, six hundred thirty-six thousand, eighty-five".