216667001216 has 64 divisors (see below), whose sum is σ = 446684112000. Its totient is φ = 104560705536.

The previous prime is 216667001209. The next prime is 216667001237. The reversal of 216667001216 is 612100766612.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 216667001216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12459920 + ... + 12477296.

It is an arithmetic number, because the mean of its divisors is an integer number (6979439250).

Almost surely, 2^216667001216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216667001216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223342056000).

216667001216 is an abundant number, since it is smaller than the sum of its proper divisors (230017110784).

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

216667001216 is a wasteful number, since it uses less digits than its factorization.

216667001216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20779 (or 20767 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 216667001216 its reverse (612100766612), we get a palindrome (828767767828).

The spelling of 216667001216 in words is "two hundred sixteen billion, six hundred sixty-seven million, one thousand, two hundred sixteen".