3225601664 has 16 divisors (see below), whose sum is σ = 6426003570. Its totient is φ = 1612800768.

The previous prime is 3225601661. The next prime is 3225601711. The reversal of 3225601664 is 4661065223.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3225331264 + 270400 = 56792^2 + 520^2 .

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 (3225601661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12599879 + ... + 12600134.

Almost surely, 2^3225601664 is an apocalyptic number.

It is an amenable number.

3225601664 is a deficient number, since it is larger than the sum of its proper divisors (3200401906).

3225601664 is an equidigital number, since it uses as much as digits as its factorization.

3225601664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25200027 (or 25200015 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 3225601664 is about 56794.3805670948. The cubic root of 3225601664 is about 1477.5320544312.

Adding to 3225601664 its reverse (4661065223), we get a palindrome (7886666887).

The spelling of 3225601664 in words is "three billion, two hundred twenty-five million, six hundred one thousand, six hundred sixty-four".