216949942144 has 64 divisors (see below), whose sum is σ = 466127560080. Its totient is φ = 99985305600.

The previous prime is 216949942141. The next prime is 216949942159. The reversal of 216949942144 is 441249949612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216949942141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055484 + ... + 1244164.

Almost surely, 2^216949942144 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 216949942144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233063780040).

216949942144 is an abundant number, since it is smaller than the sum of its proper divisors (249177617936).

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

216949942144 is a wasteful number, since it uses less digits than its factorization.

216949942144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189399 (or 189387 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 55.

The spelling of 216949942144 in words is "two hundred sixteen billion, nine hundred forty-nine million, nine hundred forty-two thousand, one hundred forty-four".