16563625 has 16 divisors (see below), whose sum is σ = 22263696. Its totient is φ = 12230400.

The previous prime is 16563619. The next prime is 16563629. The reversal of 16563625 is 52636561.

It can be written as a sum of positive squares in 8 ways, for example, as 6697744 + 9865881 = 2588^2 + 3141^2 .

It is not a de Polignac number, because 16563625 - 2¹¹ = 16561577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16563629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3472 + ... + 6721.

It is an arithmetic number, because the mean of its divisors is an integer number (1391481).

Almost surely, 2^16563625 is an apocalyptic number.

It is an amenable number.

16563625 is a deficient number, since it is larger than the sum of its proper divisors (5700071).

16563625 is a wasteful number, since it uses less digits than its factorization.

16563625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10221 (or 10211 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 16563625 is about 4069.8433630792. The cubic root of 16563625 is about 254.9089768682.

The spelling of 16563625 in words is "sixteen million, five hundred sixty-three thousand, six hundred twenty-five".