544609664 has 16 divisors (see below), whose sum is σ = 1084964820. Its totient is φ = 272304768.

The previous prime is 544609657. The next prime is 544609679. The reversal of 544609664 is 466906445.

It is a happy number.

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

It is a super-2 number, since 2×544609664² = 593199372244385792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2127254 + ... + 2127509.

Almost surely, 2^544609664 is an apocalyptic number.

It is an amenable number.

544609664 is a deficient number, since it is larger than the sum of its proper divisors (540355156).

544609664 is an equidigital number, since it uses as much as digits as its factorization.

544609664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254777 (or 4254765 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The square root of 544609664 is about 23336.8734838238. The cubic root of 544609664 is about 816.6358621913.

The spelling of 544609664 in words is "five hundred forty-four million, six hundred nine thousand, six hundred sixty-four".