16129664 has 16 divisors (see below), whose sum is σ = 32133570. Its totient is φ = 8064768.

The previous prime is 16129661. The next prime is 16129679. The reversal of 16129664 is 46692161.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 193600 = 3992^2 + 440^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (16129661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62879 + ... + 63134.

Almost surely, 2^16129664 is an apocalyptic number.

It is an amenable number.

16129664 is a deficient number, since it is larger than the sum of its proper divisors (16003906).

16129664 is an equidigital number, since it uses as much as digits as its factorization.

16129664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126027 (or 126015 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 16129664 is about 4016.1752949790. The cubic root of 16129664 is about 252.6630727794.

The spelling of 16129664 in words is "sixteen million, one hundred twenty-nine thousand, six hundred sixty-four".