216480654 has 64 divisors (see below), whose sum is σ = 522849600. Its totient is φ = 65995776.

The previous prime is 216480653. The next prime is 216480659. The reversal of 216480654 is 456084612.

216480654 is a `hidden beast` number, since 2 + 1 + 648 + 0 + 6 + 5 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216480653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77962 + ... + 80690.

It is an arithmetic number, because the mean of its divisors is an integer number (8169525).

Almost surely, 2^216480654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216480654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261424800).

216480654 is an abundant number, since it is smaller than the sum of its proper divisors (306368946).

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

216480654 is a wasteful number, since it uses less digits than its factorization.

216480654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866 (or 2860 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 216480654 is about 14713.2815510341. The cubic root of 216480654 is about 600.4447202917. Note that the first 3 decimals are identical.

The spelling of 216480654 in words is "two hundred sixteen million, four hundred eighty thousand, six hundred fifty-four".