16243868320 has 48 divisors (see below), whose sum is σ = 38771806248. Its totient is φ = 6430556160.

The previous prime is 16243868287. The next prime is 16243868323. The reversal of 16243868320 is 2386834261.

It can be written as a sum of positive squares in 4 ways, for example, as 15758283024 + 485585296 = 125532^2 + 22036^2 .

It is not an unprimeable number, because it can be changed into a prime (16243868323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507801 + ... + 538840.

Almost surely, 2^16243868320 is an apocalyptic number.

16243868320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16243868320 is an abundant number, since it is smaller than the sum of its proper divisors (22527937928).

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

16243868320 is a wasteful number, since it uses less digits than its factorization.

16243868320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046753 (or 1046745 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 16243868320 in words is "sixteen billion, two hundred forty-three million, eight hundred sixty-eight thousand, three hundred twenty".