216698904576 has 1344 divisors, whose sum is σ = 858731328000. Its totient is φ = 52022476800.

The previous prime is 216698904497. The next prime is 216698904589. The reversal of 216698904576 is 675409896612.

216698904576 is a `hidden beast` number, since 2 + 1 + 6 + 6 + 98 + 90 + 457 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5285339116 + ... + 5285339156.

It is an arithmetic number, because the mean of its divisors is an integer number (638937000).

Almost surely, 2^216698904576 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 216698904576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429365664000).

216698904576 is an abundant number, since it is smaller than the sum of its proper divisors (642032423424).

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

216698904576 is a wasteful number, since it uses less digits than its factorization.

216698904576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 216698904576 in words is "two hundred sixteen billion, six hundred ninety-eight million, nine hundred four thousand, five hundred seventy-six".