16440653 has 8 divisors (see below), whose sum is σ = 17480448. Its totient is φ = 15427984.

The previous prime is 16440629. The next prime is 16440673. The reversal of 16440653 is 35604461.

It is a happy number.

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 16440653 - 2⁸ = 16440397 is a prime.

It is a super-3 number, since 3×16440653³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16440623) 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, 5525 + ... + 7962.

It is an arithmetic number, because the mean of its divisors is an integer number (2185056).

Almost surely, 2^16440653 is an apocalyptic number.

It is an amenable number.

16440653 is a deficient number, since it is larger than the sum of its proper divisors (1039795).

16440653 is a wasteful number, since it uses less digits than its factorization.

16440653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13563.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 16440653 is about 4054.7075110296. The cubic root of 16440653 is about 254.2765757863.

The spelling of 16440653 in words is "sixteen million, four hundred forty thousand, six hundred fifty-three".