16563128769 has 12 divisors (see below), whose sum is σ = 26099475792. Its totient is φ = 10038259800.

The previous prime is 16563128753. The next prime is 16563128789. The reversal of 16563128769 is 96782136561.

16563128769 is a `hidden beast` number, since 1 + 6 + 563 + 1 + 2 + 8 + 76 + 9 = 666.

It is not a de Polignac number, because 16563128769 - 2⁴ = 16563128753 is a prime.

It is a super-2 number, since 2×16563128769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16563128719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83652067 + ... + 83652264.

It is an arithmetic number, because the mean of its divisors is an integer number (2174956316).

Almost surely, 2^16563128769 is an apocalyptic number.

It is an amenable number.

16563128769 is a deficient number, since it is larger than the sum of its proper divisors (9536347023).

16563128769 is a wasteful number, since it uses less digits than its factorization.

16563128769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167304348 (or 167304345 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 16563128769 in words is "sixteen billion, five hundred sixty-three million, one hundred twenty-eight thousand, seven hundred sixty-nine".