16553944 has 32 divisors (see below), whose sum is σ = 34025040. Its totient is φ = 7488000.

The previous prime is 16553941. The next prime is 16553981. The reversal of 16553944 is 44935561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16553941) 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, 27244 + ... + 27844.

Almost surely, 2^16553944 is an apocalyptic number.

It is an amenable number.

16553944 is an abundant number, since it is smaller than the sum of its proper divisors (17471096).

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

16553944 is a wasteful number, since it uses less digits than its factorization.

16553944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 927 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 16553944 is about 4068.6538314288. The cubic root of 16553944 is about 254.8593046750.

The spelling of 16553944 in words is "sixteen million, five hundred fifty-three thousand, nine hundred forty-four".