64321144 has 16 divisors (see below), whose sum is σ = 121278600. Its totient is φ = 31980192.

The previous prime is 64321141. The next prime is 64321157. The reversal of 64321144 is 44112346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64321141) 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, 21027 + ... + 23890.

Almost surely, 2^64321144 is an apocalyptic number.

It is an amenable number.

64321144 is a deficient number, since it is larger than the sum of its proper divisors (56957456).

64321144 is a wasteful number, since it uses less digits than its factorization.

64321144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45102 (or 45098 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 64321144 is about 8020.0463839058. The cubic root of 64321144 is about 400.6679340395.

The spelling of 64321144 in words is "sixty-four million, three hundred twenty-one thousand, one hundred forty-four".