64605241313 has 4 divisors (see below), whose sum is σ = 66180978948. Its totient is φ = 63029503680.

The previous prime is 64605241297. The next prime is 64605241343. The reversal of 64605241313 is 31314250646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3330674944 + 61274566369 = 57712^2 + 247537^2 .

It is a cyclic number.

It is not a de Polignac number, because 64605241313 - 2⁴ = 64605241297 is a prime.

It is a super-2 number, since 2×64605241313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64605241343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787868756 + ... + 787868837.

It is an arithmetic number, because the mean of its divisors is an integer number (16545244737).

Almost surely, 2^64605241313 is an apocalyptic number.

It is an amenable number.

64605241313 is a deficient number, since it is larger than the sum of its proper divisors (1575737635).

64605241313 is a wasteful number, since it uses less digits than its factorization.

64605241313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575737634.

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 64605241313 its reverse (31314250646), we get a palindrome (95919491959).

The spelling of 64605241313 in words is "sixty-four billion, six hundred five million, two hundred forty-one thousand, three hundred thirteen".