16564801 has 8 divisors (see below), whose sum is σ = 18110304. Its totient is φ = 15025920.

The previous prime is 16564747. The next prime is 16564831. The reversal of 16564801 is 10846561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16564801 - 2¹⁹ = 16040513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16564831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4641 + ... + 7393.

It is an arithmetic number, because the mean of its divisors is an integer number (2263788).

Almost surely, 2^16564801 is an apocalyptic number.

16564801 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16564801 is the 2176-th centered heptagonal number.

It is an amenable number.

16564801 is a deficient number, since it is larger than the sum of its proper divisors (1545503).

16564801 is a wasteful number, since it uses less digits than its factorization.

16564801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 16564801 is about 4069.9878378197. The cubic root of 16564801 is about 254.9150094821.

The spelling of 16564801 in words is "sixteen million, five hundred sixty-four thousand, eight hundred one".