216664155622332 has 144 divisors (see below), whose sum is σ = 603087106003200. Its totient is φ = 65038373326080.

The previous prime is 216664155622331. The next prime is 216664155622339. The reversal of 216664155622332 is 233226551466612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216664155622331) 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 47 ways as a sum of consecutive naturals, for example, 766325769 + ... + 766608447.

It is an arithmetic number, because the mean of its divisors is an integer number (4188104902800).

Almost surely, 2^{216664155622332} is an apocalyptic number.

216664155622332 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 216664155622332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301543553001600).

216664155622332 is an abundant number, since it is smaller than the sum of its proper divisors (386422950380868).

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

216664155622332 is a wasteful number, since it uses less digits than its factorization.

216664155622332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300896 (or 300891 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 54.

The spelling of 216664155622332 in words is "two hundred sixteen trillion, six hundred sixty-four billion, one hundred fifty-five million, six hundred twenty-two thousand, three hundred thirty-two".