216548837999 has 12 divisors (see below), whose sum is σ = 234500971176. Its totient is φ = 199880003232.

The previous prime is 216548837993. The next prime is 216548838007. The reversal of 216548837999 is 999738845612.

216548837999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-216548837999 is a prime.

It is a super-3 number, since 3×216548837999³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216548837993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5417324 + ... + 5457150.

It is an arithmetic number, because the mean of its divisors is an integer number (19541747598).

Almost surely, 2^216548837999 is an apocalyptic number.

216548837999 is a deficient number, since it is larger than the sum of its proper divisors (17952133177).

216548837999 is a wasteful number, since it uses less digits than its factorization.

216548837999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72026 (or 72013 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 71.

The spelling of 216548837999 in words is "two hundred sixteen billion, five hundred forty-eight million, eight hundred thirty-seven thousand, nine hundred ninety-nine".