64944253 has 16 divisors (see below), whose sum is σ = 73800000. Its totient is φ = 56609280.

The previous prime is 64944251. The next prime is 64944277. The reversal of 64944253 is 35244946.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64944253 - 2¹ = 64944251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64944251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51373 + ... + 52621.

It is an arithmetic number, because the mean of its divisors is an integer number (4612500).

Almost surely, 2^64944253 is an apocalyptic number.

It is an amenable number.

64944253 is a deficient number, since it is larger than the sum of its proper divisors (8855747).

64944253 is a wasteful number, since it uses less digits than its factorization.

64944253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its digits is 103680, while the sum is 37.

The square root of 64944253 is about 8058.7997245247. The cubic root of 64944253 is about 401.9575976497.

The spelling of 64944253 in words is "sixty-four million, nine hundred forty-four thousand, two hundred fifty-three".