216989028480 has 768 divisors, whose sum is σ = 848736092160. Its totient is φ = 46946672640.

The previous prime is 216989028463. The next prime is 216989028521. The reversal of 216989028480 is 84820989612.

It is a super-2 number, since 2×216989028480² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216989028480.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 137073769 + ... + 137075351.

It is an arithmetic number, because the mean of its divisors is an integer number (1105125120).

Almost surely, 2^216989028480 is an apocalyptic number.

216989028480 is a gapful number since it is divisible by the number (20) 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 216989028480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424368046080).

216989028480 is an abundant number, since it is smaller than the sum of its proper divisors (631747063680).

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

216989028480 is a wasteful number, since it uses less digits than its factorization.

216989028480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 216989028480 in words is "two hundred sixteen billion, nine hundred eighty-nine million, twenty-eight thousand, four hundred eighty".