64441585 has 8 divisors (see below), whose sum is σ = 83278440. Its totient is φ = 47587584.

The previous prime is 64441583. The next prime is 64441609. The reversal of 64441585 is 58514446.

It can be written as a sum of positive squares in 4 ways, for example, as 553536 + 63888049 = 744^2 + 7993^2 .

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 64441585 - 2¹ = 64441583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64441583) 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, 495640 + ... + 495769.

It is an arithmetic number, because the mean of its divisors is an integer number (10409805).

Almost surely, 2^64441585 is an apocalyptic number.

64441585 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64441585 is a deficient number, since it is larger than the sum of its proper divisors (18836855).

64441585 is a wasteful number, since it uses less digits than its factorization.

64441585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991427.

The product of its digits is 76800, while the sum is 37.

The square root of 64441585 is about 8027.5516192672. The cubic root of 64441585 is about 400.9178609671.

The spelling of 64441585 in words is "sixty-four million, four hundred forty-one thousand, five hundred eighty-five".