64518085 has 8 divisors (see below), whose sum is σ = 77469336. Its totient is φ = 51582720.

The previous prime is 64518079. The next prime is 64518089. The reversal of 64518085 is 58081546.

It can be written as a sum of positive squares in 4 ways, for example, as 1267876 + 63250209 = 1126^2 + 7953^2 .

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

It is not a de Polignac number, because 64518085 - 2⁹ = 64517573 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 (64518089) 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, 8577 + ... + 14233.

It is an arithmetic number, because the mean of its divisors is an integer number (9683667).

Almost surely, 2^64518085 is an apocalyptic number.

It is an amenable number.

64518085 is a deficient number, since it is larger than the sum of its proper divisors (12951251).

64518085 is a wasteful number, since it uses less digits than its factorization.

64518085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7943.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 64518085 is about 8032.3150461122. The cubic root of 64518085 is about 401.0764443205.

The spelling of 64518085 in words is "sixty-four million, five hundred eighteen thousand, eighty-five".