16563566252 has 12 divisors (see below), whose sum is σ = 29068357416. Its totient is φ = 8258321280.

The previous prime is 16563566213. The next prime is 16563566263. The reversal of 16563566252 is 25266536561.

It is a junction number, because it is equal to n+sod(n) for n = 16563566197 and 16563566206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5863874 + ... + 5866697.

It is an arithmetic number, because the mean of its divisors is an integer number (2422363118).

Almost surely, 2^16563566252 is an apocalyptic number.

It is an amenable number.

16563566252 is a deficient number, since it is larger than the sum of its proper divisors (12504791164).

16563566252 is a wasteful number, since it uses less digits than its factorization.

16563566252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11730928 (or 11730926 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 47.

The spelling of 16563566252 in words is "sixteen billion, five hundred sixty-three million, five hundred sixty-six thousand, two hundred fifty-two".