16563221314 has 16 divisors (see below), whose sum is σ = 24900255000. Its totient is φ = 8263157760.

The previous prime is 16563221281. The next prime is 16563221321. The reversal of 16563221314 is 41312236561.

It can be written as a sum of positive squares in 4 ways, for example, as 12776911225 + 3786310089 = 113035^2 + 61533^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16563221314.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1896622 + ... + 1905334.

Almost surely, 2^16563221314 is an apocalyptic number.

16563221314 is a deficient number, since it is larger than the sum of its proper divisors (8337033686).

16563221314 is a wasteful number, since it uses less digits than its factorization.

16563221314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10725.

The product of its digits is 25920, while the sum is 34.

Adding to 16563221314 its reverse (41312236561), we get a palindrome (57875457875).

The spelling of 16563221314 in words is "sixteen billion, five hundred sixty-three million, two hundred twenty-one thousand, three hundred fourteen".