16508307816 has 512 divisors, whose sum is σ = 62176665600. Its totient is φ = 3951763200.

The previous prime is 16508307763. The next prime is 16508307839. The reversal of 16508307816 is 61870380561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 26161821 + ... + 26162451.

It is an arithmetic number, because the mean of its divisors is an integer number (121438800).

Almost surely, 2^16508307816 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 16508307816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31088332800).

16508307816 is an abundant number, since it is smaller than the sum of its proper divisors (45668357784).

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

16508307816 is a wasteful number, since it uses less digits than its factorization.

16508307816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 16508307816 in words is "sixteen billion, five hundred eight million, three hundred seven thousand, eight hundred sixteen".