16520067648 has 168 divisors, whose sum is σ = 55862443520. Its totient is φ = 4567726080.

The previous prime is 16520067631. The next prime is 16520067659. The reversal of 16520067648 is 84676002561.

16520067648 is a `hidden beast` number, since 1 + 6 + 520 + 0 + 67 + 64 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58908 + ... + 191076.

Almost surely, 2^16520067648 is an apocalyptic number.

16520067648 is a gapful number since it is divisible by the number (18) 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 16520067648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27931221760).

16520067648 is an abundant number, since it is smaller than the sum of its proper divisors (39342375872).

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

16520067648 is a wasteful number, since it uses less digits than its factorization.

16520067648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132225 (or 132212 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 16520067648 in words is "sixteen billion, five hundred twenty million, sixty-seven thousand, six hundred forty-eight".