64444613 has 8 divisors (see below), whose sum is σ = 64953600. Its totient is φ = 63938160.

The previous prime is 64444607. The next prime is 64444621. The reversal of 64444613 is 31644446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64444613 - 2¹² = 64440517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64444613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64444673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107288 + ... + 107886.

It is an arithmetic number, because the mean of its divisors is an integer number (8119200).

Almost surely, 2^64444613 is an apocalyptic number.

It is an amenable number.

64444613 is a deficient number, since it is larger than the sum of its proper divisors (508987).

64444613 is a wasteful number, since it uses less digits than its factorization.

64444613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267.

The product of its digits is 27648, while the sum is 32.

The square root of 64444613 is about 8027.7402175207. The cubic root of 64444613 is about 400.9241403506.

The spelling of 64444613 in words is "sixty-four million, four hundred forty-four thousand, six hundred thirteen".