16604501 has 8 divisors (see below), whose sum is σ = 17350200. Its totient is φ = 15870400.

The previous prime is 16604491. The next prime is 16604503. The reversal of 16604501 is 10540661.

It can be written as a sum of positive squares in 4 ways, for example, as 4708900 + 11895601 = 2170^2 + 3449^2 .

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 16604501 - 2¹⁸ = 16342357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16604503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95 + ... + 5763.

It is an arithmetic number, because the mean of its divisors is an integer number (2168775).

Almost surely, 2^16604501 is an apocalyptic number.

It is an amenable number.

16604501 is a deficient number, since it is larger than the sum of its proper divisors (745699).

16604501 is a wasteful number, since it uses less digits than its factorization.

16604501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 16604501 is about 4074.8620835557. The cubic root of 16604501 is about 255.1184942051.

The spelling of 16604501 in words is "sixteen million, six hundred four thousand, five hundred one".