16644542 has 8 divisors (see below), whose sum is σ = 25339656. Its totient is φ = 8197992.

The previous prime is 16644539. The next prime is 16644553. The reversal of 16644542 is 24544661.

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

It is a junction number, because it is equal to n+sod(n) for n = 16644499 and 16644508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61973 + ... + 62240.

It is an arithmetic number, because the mean of its divisors is an integer number (3167457).

Almost surely, 2^16644542 is an apocalyptic number.

16644542 is a deficient number, since it is larger than the sum of its proper divisors (8695114).

16644542 is a wasteful number, since it uses less digits than its factorization.

16644542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124282.

The product of its digits is 23040, while the sum is 32.

The square root of 16644542 is about 4079.7722975676. The cubic root of 16644542 is about 255.3233984747.

The spelling of 16644542 in words is "sixteen million, six hundred forty-four thousand, five hundred forty-two".