216988952616 has 96 divisors (see below), whose sum is σ = 605735919360. Its totient is φ = 70131753216.

The previous prime is 216988952603. The next prime is 216988952627. The reversal of 216988952616 is 616259889612.

216988952616 is a `hidden beast` number, since 2 + 1 + 6 + 9 + 8 + 8 + 9 + 5 + 2 + 616 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 168361 + ... + 679943.

It is an arithmetic number, because the mean of its divisors is an integer number (6309749160).

Almost surely, 2^216988952616 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 216988952616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302867959680).

216988952616 is an abundant number, since it is smaller than the sum of its proper divisors (388746966744).

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

216988952616 is a wasteful number, since it uses less digits than its factorization.

216988952616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511775 (or 511768 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 63.

The spelling of 216988952616 in words is "two hundred sixteen billion, nine hundred eighty-eight million, nine hundred fifty-two thousand, six hundred sixteen".