16640169 has 16 divisors (see below), whose sum is σ = 27307392. Its totient is φ = 8777088.

The previous prime is 16640167. The next prime is 16640177. The reversal of 16640169 is 96104661.

It is not a de Polignac number, because 16640169 - 2¹ = 16640167 is a prime.

It is a super-2 number, since 2×16640169² = 553790448697122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16640167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30204 + ... + 30749.

It is an arithmetic number, because the mean of its divisors is an integer number (1706712).

Almost surely, 2^16640169 is an apocalyptic number.

It is an amenable number.

16640169 is a deficient number, since it is larger than the sum of its proper divisors (10667223).

16640169 is a wasteful number, since it uses less digits than its factorization.

16640169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60976.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 16640169 is about 4079.2363255884. The cubic root of 16640169 is about 255.3010362489.

The spelling of 16640169 in words is "sixteen million, six hundred forty thousand, one hundred sixty-nine".