216682714656 has 192 divisors, whose sum is σ = 652305830400. Its totient is φ = 69942521088.

The previous prime is 216682714649. The next prime is 216682714669. The reversal of 216682714656 is 656417286612.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3383671 + ... + 3447113.

It is an arithmetic number, because the mean of its divisors is an integer number (3397426200).

Almost surely, 2^216682714656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216682714656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326152915200).

216682714656 is an abundant number, since it is smaller than the sum of its proper divisors (435623115744).

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

216682714656 is a wasteful number, since it uses less digits than its factorization.

216682714656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63588 (or 63574 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 216682714656 in words is "two hundred sixteen billion, six hundred eighty-two million, seven hundred fourteen thousand, six hundred fifty-six".