216373623340 has 48 divisors (see below), whose sum is σ = 519429722112. Its totient is φ = 74166238656.

The previous prime is 216373623337. The next prime is 216373623359. The reversal of 216373623340 is 43326373612.

It is a junction number, because it is equal to n+sod(n) for n = 216373623293 and 216373623302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356037 + ... + 748003.

It is an arithmetic number, because the mean of its divisors is an integer number (10821452544).

Almost surely, 2^216373623340 is an apocalyptic number.

216373623340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216373623340 is an abundant number, since it is smaller than the sum of its proper divisors (303056098772).

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

216373623340 is a wasteful number, since it uses less digits than its factorization.

216373623340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395926 (or 395924 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 40.

Adding to 216373623340 its reverse (43326373612), we get a palindrome (259699996952).

The spelling of 216373623340 in words is "two hundred sixteen billion, three hundred seventy-three million, six hundred twenty-three thousand, three hundred forty".