216406021260 has 288 divisors, whose sum is σ = 718911228672. Its totient is φ = 47952161280.

The previous prime is 216406021241. The next prime is 216406021283. The reversal of 216406021260 is 62120604612.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 98231319 + ... + 98233521.

It is an arithmetic number, because the mean of its divisors is an integer number (2496219544).

Almost surely, 2^216406021260 is an apocalyptic number.

216406021260 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 216406021260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359455614336).

216406021260 is an abundant number, since it is smaller than the sum of its proper divisors (502505207412).

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

216406021260 is a wasteful number, since it uses less digits than its factorization.

216406021260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453 (or 2344 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 216406021260 its reverse (62120604612), we get a palindrome (278526625872).

The spelling of 216406021260 in words is "two hundred sixteen billion, four hundred six million, twenty-one thousand, two hundred sixty".