216997704384 has 56 divisors (see below), whose sum is σ = 574495208640. Its totient is φ = 72287787264.

The previous prime is 216997704373. The next prime is 216997704421. The reversal of 216997704384 is 483407799612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38194 + ... + 659889.

Almost surely, 2^216997704384 is an apocalyptic number.

216997704384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216997704384 is an abundant number, since it is smaller than the sum of its proper divisors (357497504256).

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

216997704384 is a wasteful number, since it uses less digits than its factorization.

216997704384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699717 (or 699707 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 60.

The spelling of 216997704384 in words is "two hundred sixteen billion, nine hundred ninety-seven million, seven hundred four thousand, three hundred eighty-four".