216409307340 has 24 divisors (see below), whose sum is σ = 605946060720. Its totient is φ = 57709148608.

The previous prime is 216409307329. The next prime is 216409307357. The reversal of 216409307340 is 43703904612.

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 7 ways as a sum of consecutive naturals, for example, 1803410835 + ... + 1803410954.

It is an arithmetic number, because the mean of its divisors is an integer number (25247752530).

Almost surely, 2^216409307340 is an apocalyptic number.

216409307340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216409307340 is an abundant number, since it is smaller than the sum of its proper divisors (389536753380).

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

216409307340 is a wasteful number, since it uses less digits than its factorization.

216409307340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606821801 (or 3606821799 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 216409307340 in words is "two hundred sixteen billion, four hundred nine million, three hundred seven thousand, three hundred forty".