16351644 has 12 divisors (see below), whose sum is σ = 38153864. Its totient is φ = 5450544.

The previous prime is 16351627. The next prime is 16351649. The reversal of 16351644 is 44615361.

16351644 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16351649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681307 + ... + 681330.

Almost surely, 2^16351644 is an apocalyptic number.

It is an amenable number.

16351644 is an abundant number, since it is smaller than the sum of its proper divisors (21802220).

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

16351644 is a wasteful number, since it uses less digits than its factorization.

16351644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362644 (or 1362642 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 16351644 is about 4043.7166072810. The cubic root of 16351644 is about 253.8168642903.

The spelling of 16351644 in words is "sixteen million, three hundred fifty-one thousand, six hundred forty-four".