216605260160 has 64 divisors (see below), whose sum is σ = 518169690000. Its totient is φ = 86583920640.

The previous prime is 216605260159. The next prime is 216605260199. The reversal of 216605260160 is 61062506612.

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 216605260160.

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, 846470 + ... + 1072250.

Almost surely, 2^216605260160 is an apocalyptic number.

216605260160 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 216605260160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259084845000).

216605260160 is an abundant number, since it is smaller than the sum of its proper divisors (301564429840).

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

216605260160 is a wasteful number, since it uses less digits than its factorization.

216605260160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227299 (or 227287 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 216605260160 its reverse (61062506612), we get a palindrome (277667766772).

The spelling of 216605260160 in words is "two hundred sixteen billion, six hundred five million, two hundred sixty thousand, one hundred sixty".