16459765816 has 128 divisors (see below), whose sum is σ = 36739584000. Its totient is φ = 6880857984.

The previous prime is 16459765813. The next prime is 16459765853. The reversal of 16459765816 is 61856795461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16459765811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7679641 + ... + 7681783.

It is an arithmetic number, because the mean of its divisors is an integer number (287028000).

Almost surely, 2^16459765816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16459765816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18369792000).

16459765816 is an abundant number, since it is smaller than the sum of its proper divisors (20279818184).

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

16459765816 is a wasteful number, since it uses less digits than its factorization.

16459765816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230 (or 2200 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 58.

The spelling of 16459765816 in words is "sixteen billion, four hundred fifty-nine million, seven hundred sixty-five thousand, eight hundred sixteen".