16563280536 has 288 divisors, whose sum is σ = 51926434560. Its totient is φ = 4756752000.

The previous prime is 16563280463. The next prime is 16563280543. The reversal of 16563280536 is 63508236561.

16563280536 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 32 + 80 + 536 = 666.

It is a super-2 number, since 2×16563280536² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16563280491 and 16563280500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 26248941 + ... + 26249571.

It is an arithmetic number, because the mean of its divisors is an integer number (180300120).

Almost surely, 2^16563280536 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 16563280536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25963217280).

16563280536 is an abundant number, since it is smaller than the sum of its proper divisors (35363154024).

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

16563280536 is a wasteful number, since it uses less digits than its factorization.

16563280536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 16563280536 in words is "sixteen billion, five hundred sixty-three million, two hundred eighty thousand, five hundred thirty-six".