65604144 has 20 divisors (see below), whose sum is σ = 169477496. Its totient is φ = 21868032.

The previous prime is 65604137. The next prime is 65604163. The reversal of 65604144 is 44140656.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 683329 + ... + 683424.

Almost surely, 2^65604144 is an apocalyptic number.

It is an amenable number.

65604144 is an abundant number, since it is smaller than the sum of its proper divisors (103873352).

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

65604144 is a wasteful number, since it uses less digits than its factorization.

65604144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366764 (or 1366758 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 65604144 is about 8099.6385104522. The cubic root of 65604144 is about 403.3144272418.

It can be divided in two parts, 656041 and 44, that added together give a triangular number (656085 = T₁₁₄₅).

The spelling of 65604144 in words is "sixty-five million, six hundred four thousand, one hundred forty-four".