216686881063884 has 768 divisors, whose sum is σ = 698438909952000. Its totient is φ = 50615939404800.

The previous prime is 216686881063883. The next prime is 216686881063949. The reversal of 216686881063884 is 488360188686612.

It is not an unprimeable number, because it can be changed into a prime (216686881063883) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 5764309929 + ... + 5764347519.

It is an arithmetic number, because the mean of its divisors is an integer number (909425664000).

Almost surely, 2^{216686881063884} 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 216686881063884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349219454976000).

216686881063884 is an abundant number, since it is smaller than the sum of its proper divisors (481752028888116).

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

216686881063884 is a wasteful number, since it uses less digits than its factorization.

216686881063884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37914 (or 37912 counting only the distinct ones).

The product of its (nonzero) digits is 1019215872, while the sum is 75.

The spelling of 216686881063884 in words is "two hundred sixteen trillion, six hundred eighty-six billion, eight hundred eighty-one million, sixty-three thousand, eight hundred eighty-four".