216210210606 has 32 divisors (see below), whose sum is σ = 517426146720. Its totient is φ = 66526218432.

The previous prime is 216210210569. The next prime is 216210210631. The reversal of 216210210606 is 606012012612.

216210210606 is a `hidden beast` number, since 2 + 16 + 21 + 0 + 21 + 0 + 606 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 216210210606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153995175 + ... + 153996578.

It is an arithmetic number, because the mean of its divisors is an integer number (16169567085).

Almost surely, 2^216210210606 is an apocalyptic number.

216210210606 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

216210210606 is an abundant number, since it is smaller than the sum of its proper divisors (301215936114).

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

216210210606 is a wasteful number, since it uses less digits than its factorization.

216210210606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307991777 (or 307991771 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The spelling of 216210210606 in words is "two hundred sixteen billion, two hundred ten million, two hundred ten thousand, six hundred six".