216827886857 has 8 divisors (see below), whose sum is σ = 219481044384. Its totient is φ = 214175700288.

The previous prime is 216827886827. The next prime is 216827886881. The reversal of 216827886857 is 758688728612.

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

It is a cyclic number.

It is not a de Polignac number, because 216827886857 - 2⁸ = 216827886601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216827886827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211793 + ... + 691745.

It is an arithmetic number, because the mean of its divisors is an integer number (27435130548).

Almost surely, 2^216827886857 is an apocalyptic number.

It is an amenable number.

216827886857 is a deficient number, since it is larger than the sum of its proper divisors (2653157527).

216827886857 is an equidigital number, since it uses as much as digits as its factorization.

216827886857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485479.

The product of its digits is 144506880, while the sum is 68.

The spelling of 216827886857 in words is "two hundred sixteen billion, eight hundred twenty-seven million, eight hundred eighty-six thousand, eight hundred fifty-seven".