216169680 has 80 divisors (see below), whose sum is σ = 671546304. Its totient is φ = 57523200.

The previous prime is 216169633. The next prime is 216169699. The reversal of 216169680 is 86961612.

216169680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

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, 205155 + ... + 206205.

Almost surely, 2^216169680 is an apocalyptic number.

216169680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216169680 is an abundant number, since it is smaller than the sum of its proper divisors (455376624).

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

216169680 is a wasteful number, since it uses less digits than its factorization.

216169680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 216169680 is about 14702.7099542907. The cubic root of 216169680 is about 600.1570699892.

The spelling of 216169680 in words is "two hundred sixteen million, one hundred sixty-nine thousand, six hundred eighty".