16561608 has 48 divisors (see below), whose sum is σ = 48167280. Its totient is φ = 4731552.

The previous prime is 16561603. The next prime is 16561613. The reversal of 16561608 is 80616561.

It is an interprime number because it is at equal distance from previous prime (16561603) and next prime (16561613).

It is not an unprimeable number, because it can be changed into a prime (16561603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5866 + ... + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (1003485).

Almost surely, 2^16561608 is an apocalyptic number.

It is an amenable number.

16561608 is an abundant number, since it is smaller than the sum of its proper divisors (31605672).

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

16561608 is a wasteful number, since it uses less digits than its factorization.

16561608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14106 (or 14095 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 16561608 is about 4069.5955573005. The cubic root of 16561608 is about 254.8986294498.

The spelling of 16561608 in words is "sixteen million, five hundred sixty-one thousand, six hundred eight".