216575426928 has 120 divisors (see below), whose sum is σ = 651390696720. Its totient is φ = 61825505280.

The previous prime is 216575426923. The next prime is 216575426941. The reversal of 216575426928 is 829624575612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216575426923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2738728 + ... + 2816696.

It is an arithmetic number, because the mean of its divisors is an integer number (5428255806).

Almost surely, 2^216575426928 is an apocalyptic number.

216575426928 is a gapful number since it is divisible by the number (28) 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 216575426928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325695348360).

216575426928 is an abundant number, since it is smaller than the sum of its proper divisors (434815269792).

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

216575426928 is a wasteful number, since it uses less digits than its factorization.

216575426928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79175 (or 79162 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 57.

The spelling of 216575426928 in words is "two hundred sixteen billion, five hundred seventy-five million, four hundred twenty-six thousand, nine hundred twenty-eight".