216433853661 has 16 divisors (see below), whose sum is σ = 288907553664. Its totient is φ = 144124795584.

The previous prime is 216433853593. The next prime is 216433853663. The reversal of 216433853661 is 166358334612.

216433853661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216433853661 - 2¹³ = 216433845469 is a prime.

It is a super-2 number, since 2×216433853661² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216433853661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216433853663) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10029295 + ... + 10050851.

It is an arithmetic number, because the mean of its divisors is an integer number (18056722104).

Almost surely, 2^216433853661 is an apocalyptic number.

It is an amenable number.

216433853661 is a deficient number, since it is larger than the sum of its proper divisors (72473700003).

216433853661 is a wasteful number, since it uses less digits than its factorization.

216433853661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25220.

The product of its digits is 1866240, while the sum is 48.

The spelling of 216433853661 in words is "two hundred sixteen billion, four hundred thirty-three million, eight hundred fifty-three thousand, six hundred sixty-one".