216569852928 has 1320 divisors, whose sum is σ = 826402721760. Its totient is φ = 55539302400.

The previous prime is 216569852911. The next prime is 216569852951. The reversal of 216569852928 is 829258965612.

216569852928 is a `hidden beast` number, since 2 + 16 + 5 + 6 + 98 + 529 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 6986124273 + ... + 6986124303.

It is an arithmetic number, because the mean of its divisors is an integer number (626062668).

Almost surely, 2^216569852928 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 216569852928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413201360880).

216569852928 is an abundant number, since it is smaller than the sum of its proper divisors (609832868832).

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

216569852928 is a wasteful number, since it uses less digits than its factorization.

216569852928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 79 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 63.

The spelling of 216569852928 in words is "two hundred sixteen billion, five hundred sixty-nine million, eight hundred fifty-two thousand, nine hundred twenty-eight".