16601604 has 48 divisors (see below), whose sum is σ = 40219200. Its totient is φ = 5325696.

The previous prime is 16601603. The next prime is 16601609. The reversal of 16601604 is 40610661.

It is a super-2 number, since 2×16601604² = 551226510745632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16601603) 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 15 ways as a sum of consecutive naturals, for example, 61582 + ... + 61850.

It is an arithmetic number, because the mean of its divisors is an integer number (837900).

Almost surely, 2^16601604 is an apocalyptic number.

It is an amenable number.

16601604 is an abundant number, since it is smaller than the sum of its proper divisors (23617596).

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

16601604 is a wasteful number, since it uses less digits than its factorization.

16601604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 16601604 is about 4074.5065958960. The cubic root of 16601604 is about 255.1036564359.

It can be divided in two parts, 16601 and 604, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 16601604 in words is "sixteen million, six hundred one thousand, six hundred four".