216458854612 has 96 divisors (see below), whose sum is σ = 508998389760. Its totient is φ = 77786766720.

The previous prime is 216458854609. The next prime is 216458854613.

216458854612 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 216458854612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216458854613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5292939 + ... + 5333677.

It is an arithmetic number, because the mean of its divisors is an integer number (5302066560).

Almost surely, 2^216458854612 is an apocalyptic number.

216458854612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216458854612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254499194880).

216458854612 is an abundant number, since it is smaller than the sum of its proper divisors (292539535148).

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

216458854612 is a wasteful number, since it uses less digits than its factorization.

216458854612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42101 (or 42099 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 52.

The spelling of 216458854612 in words is "two hundred sixteen billion, four hundred fifty-eight million, eight hundred fifty-four thousand, six hundred twelve".