16641745 has 8 divisors (see below), whose sum is σ = 20223360. Its totient is φ = 13144560.

The previous prime is 16641743. The next prime is 16641763. The reversal of 16641745 is 54714661.

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

It is not a de Polignac number, because 16641745 - 2¹ = 16641743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16641745.

It is not an unprimeable number, because it can be changed into a prime (16641743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20671 + ... + 21460.

It is an arithmetic number, because the mean of its divisors is an integer number (2527920).

Almost surely, 2^16641745 is an apocalyptic number.

It is an amenable number.

16641745 is a deficient number, since it is larger than the sum of its proper divisors (3581615).

16641745 is an equidigital number, since it uses as much as digits as its factorization.

16641745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42215.

The product of its digits is 20160, while the sum is 34.

The square root of 16641745 is about 4079.4294944269. The cubic root of 16641745 is about 255.3090958973.

The spelling of 16641745 in words is "sixteen million, six hundred forty-one thousand, seven hundred forty-five".