216481846660 has 48 divisors (see below), whose sum is σ = 465913324800. Its totient is φ = 84466497024.

The previous prime is 216481846631. The next prime is 216481846717. The reversal of 216481846660 is 66648184612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216481846598 and 216481846607.

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, 694245 + ... + 956524.

It is an arithmetic number, because the mean of its divisors is an integer number (9706527600).

Almost surely, 2^216481846660 is an apocalyptic number.

216481846660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216481846660 is an abundant number, since it is smaller than the sum of its proper divisors (249431478140).

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

216481846660 is a wasteful number, since it uses less digits than its factorization.

216481846660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650940 (or 1650938 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 52.

The spelling of 216481846660 in words is "two hundred sixteen billion, four hundred eighty-one million, eight hundred forty-six thousand, six hundred sixty".