16243301840 has 80 divisors (see below), whose sum is σ = 38260207440. Its totient is φ = 6412615680.

The previous prime is 16243301791. The next prime is 16243301843. The reversal of 16243301840 is 4810334261.

It can be written as a sum of positive squares in 8 ways, for example, as 1653560896 + 14589740944 = 40664^2 + 120788^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 16243301797 and 16243301806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16243301843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3015950 + ... + 3021330.

It is an arithmetic number, because the mean of its divisors is an integer number (478252593).

Almost surely, 2^16243301840 is an apocalyptic number.

16243301840 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 16243301840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19130103720).

16243301840 is an abundant number, since it is smaller than the sum of its proper divisors (22016905600).

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

16243301840 is a wasteful number, since it uses less digits than its factorization.

16243301840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880 (or 5874 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 16243301840 in words is "sixteen billion, two hundred forty-three million, three hundred one thousand, eight hundred forty".