216543345612 has 48 divisors (see below), whose sum is σ = 552061367424. Its totient is φ = 65516800000.

The previous prime is 216543345589. The next prime is 216543345647.

216543345612 is nontrivially palindromic in base 10.

216543345612 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1195014 + ... + 1364237.

It is an arithmetic number, because the mean of its divisors is an integer number (11501278488).

Almost surely, 2^216543345612 is an apocalyptic number.

216543345612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216543345612 is an abundant number, since it is smaller than the sum of its proper divisors (335518021812).

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

216543345612 is a wasteful number, since it uses less digits than its factorization.

216543345612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559910 (or 2559908 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 216543345612 in words is "two hundred sixteen billion, five hundred forty-three million, three hundred forty-five thousand, six hundred twelve".