216281856844 has 24 divisors (see below), whose sum is σ = 378846458928. Its totient is φ = 108040067520.

The previous prime is 216281856841. The next prime is 216281856863. The reversal of 216281856844 is 448658182612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (216281856841) 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, 23614714 + ... + 23623870.

It is an arithmetic number, because the mean of its divisors is an integer number (15785269122).

Almost surely, 2^216281856844 is an apocalyptic number.

It is an amenable number.

216281856844 is a deficient number, since it is larger than the sum of its proper divisors (162564602084).

216281856844 is a wasteful number, since it uses less digits than its factorization.

216281856844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14025 (or 14023 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 55.

The spelling of 216281856844 in words is "two hundred sixteen billion, two hundred eighty-one million, eight hundred fifty-six thousand, eight hundred forty-four".