16243563240 has 192 divisors, whose sum is σ = 58327776000. Its totient is φ = 3899529216.

The previous prime is 16243563233. The next prime is 16243563289. The reversal of 16243563240 is 4236534261.

16243563240 is a `hidden beast` number, since 1 + 62 + 4 + 356 + 3 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16243563195 and 16243563204.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83061 + ... + 198459.

It is an arithmetic number, because the mean of its divisors is an integer number (303790500).

Almost surely, 2^16243563240 is an apocalyptic number.

16243563240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16243563240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29163888000).

16243563240 is an abundant number, since it is smaller than the sum of its proper divisors (42084212760).

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

16243563240 is a wasteful number, since it uses less digits than its factorization.

16243563240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115456 (or 115449 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 16243563240 in words is "sixteen billion, two hundred forty-three million, five hundred sixty-three thousand, two hundred forty".