216234145688 has 32 divisors (see below), whose sum is σ = 451707701760. Its totient is φ = 96197006880.

The previous prime is 216234145667. The next prime is 216234145691. The reversal of 216234145688 is 886541432612.

216234145688 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 2×216234145688² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 26136356 + ... + 26144627.

It is an arithmetic number, because the mean of its divisors is an integer number (14115865680).

Almost surely, 2^216234145688 is an apocalyptic number.

It is an amenable number.

216234145688 is an abundant number, since it is smaller than the sum of its proper divisors (235473556072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216234145688 is a wasteful number, since it uses less digits than its factorization.

216234145688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52281047 (or 52281043 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 50.

The spelling of 216234145688 in words is "two hundred sixteen billion, two hundred thirty-four million, one hundred forty-five thousand, six hundred eighty-eight".