16640045 has 8 divisors (see below), whose sum is σ = 20049120. Its totient is φ = 13258000.

The previous prime is 16640033. The next prime is 16640051. The reversal of 16640045 is 54004661.

It is a happy number.

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

It is not a de Polignac number, because 16640045 - 2⁸ = 16639789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16639996 and 16640023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5375 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (2506140).

Almost surely, 2^16640045 is an apocalyptic number.

It is an amenable number.

16640045 is a deficient number, since it is larger than the sum of its proper divisors (3409075).

16640045 is a wasteful number, since it uses less digits than its factorization.

16640045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13515.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 16640045 is about 4079.2211266368. The cubic root of 16640045 is about 255.3004020926.

The spelling of 16640045 in words is "sixteen million, six hundred forty thousand, forty-five".