216433853678 has 48 divisors (see below), whose sum is σ = 378990200160. Its totient is φ = 92430003456.

The previous prime is 216433853663. The next prime is 216433853711. The reversal of 216433853678 is 876358334612.

216433853678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216433853678² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38378783 + ... + 38384421.

It is an arithmetic number, because the mean of its divisors is an integer number (7895629170).

Almost surely, 2^216433853678 is an apocalyptic number.

216433853678 is a deficient number, since it is larger than the sum of its proper divisors (162556346482).

216433853678 is a wasteful number, since it uses less digits than its factorization.

216433853678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6969 (or 6962 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 56.

The spelling of 216433853678 in words is "two hundred sixteen billion, four hundred thirty-three million, eight hundred fifty-three thousand, six hundred seventy-eight".