64644303303 has 12 divisors (see below), whose sum is σ = 96594936360. Its totient is φ = 41610126096.

The previous prime is 64644303293. The next prime is 64644303329. The reversal of 64644303303 is 30330344646.

64644303303 is a `hidden beast` number, since 6 + 4 + 6 + 44 + 303 + 303 = 666.

It is not a de Polignac number, because 64644303303 - 2⁵ = 64644303271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64644305303) 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 11 ways as a sum of consecutive naturals, for example, 123839401 + ... + 123839922.

It is an arithmetic number, because the mean of its divisors is an integer number (8049578030).

Almost surely, 2^64644303303 is an apocalyptic number.

64644303303 is a deficient number, since it is larger than the sum of its proper divisors (31950633057).

64644303303 is a wasteful number, since it uses less digits than its factorization.

64644303303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247679358 (or 247679355 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 36.

Adding to 64644303303 its reverse (30330344646), we get a palindrome (94974647949).

The spelling of 64644303303 in words is "sixty-four billion, six hundred forty-four million, three hundred three thousand, three hundred three".