16563324960 has 864 divisors, whose sum is σ = 73180558080. Its totient is φ = 3487131648.

The previous prime is 16563324931. The next prime is 16563324991. The reversal of 16563324960 is 6942336561.

16563324960 is a `hidden beast` number, since 1 + 6 + 5 + 633 + 2 + 4 + 9 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (864).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 35773689 + ... + 35774151.

It is an arithmetic number, because the mean of its divisors is an integer number (84699720).

Almost surely, 2^16563324960 is an apocalyptic number.

16563324960 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 16563324960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36590279040).

16563324960 is an abundant number, since it is smaller than the sum of its proper divisors (56617233120).

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

16563324960 is a wasteful number, since it uses less digits than its factorization.

16563324960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The spelling of 16563324960 in words is "sixteen billion, five hundred sixty-three million, three hundred twenty-four thousand, nine hundred sixty".