16243859856 has 200 divisors, whose sum is σ = 51840190944. Its totient is φ = 4367569920.

The previous prime is 16243859851. The next prime is 16243859887. The reversal of 16243859856 is 65895834261.

It is a junction number, because it is equal to n+sod(n) for n = 16243859796 and 16243859805.

It is not an unprimeable number, because it can be changed into a prime (16243859851) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1955071 + ... + 1963361.

Almost surely, 2^16243859856 is an apocalyptic number.

16243859856 is a gapful number since it is divisible by the number (16) 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 16243859856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25920095472).

16243859856 is an abundant number, since it is smaller than the sum of its proper divisors (35596331088).

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

16243859856 is an equidigital number, since it uses as much as digits as its factorization.

16243859856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8347 (or 8320 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 57.

The spelling of 16243859856 in words is "sixteen billion, two hundred forty-three million, eight hundred fifty-nine thousand, eight hundred fifty-six".