16564496 has 40 divisors (see below), whose sum is σ = 34961304. Its totient is φ = 7557120.

The previous prime is 16564469. The next prime is 16564501. The reversal of 16564496 is 69446561.

It can be written as a sum of positive squares in 4 ways, for example, as 48400 + 16516096 = 220^2 + 4064^2 .

It is a nialpdrome in base 16.

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, 19766 + ... + 20586.

Almost surely, 2^16564496 is an apocalyptic number.

16564496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16564496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17480652).

16564496 is an abundant number, since it is smaller than the sum of its proper divisors (18396808).

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

16564496 is a wasteful number, since it uses less digits than its factorization.

16564496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 933 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 16564496 is about 4069.9503682478. The cubic root of 16564496 is about 254.9134449285.

The spelling of 16564496 in words is "sixteen million, five hundred sixty-four thousand, four hundred ninety-six".