16453644 has 12 divisors (see below), whose sum is σ = 38391864. Its totient is φ = 5484544.

The previous prime is 16453627. The next prime is 16453663. The reversal of 16453644 is 44635461.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685557 + ... + 685580.

It is an arithmetic number, because the mean of its divisors is an integer number (3199322).

Almost surely, 2^16453644 is an apocalyptic number.

It is an amenable number.

16453644 is an abundant number, since it is smaller than the sum of its proper divisors (21938220).

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

16453644 is a wasteful number, since it uses less digits than its factorization.

16453644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371144 (or 1371142 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 16453644 is about 4056.3091598151. The cubic root of 16453644 is about 254.3435325208.

The spelling of 16453644 in words is "sixteen million, four hundred fifty-three thousand, six hundred forty-four".