64520607830223 has 4 divisors (see below), whose sum is σ = 86027477106968. Its totient is φ = 43013738553480.

The previous prime is 64520607830221. The next prime is 64520607830257. The reversal of 64520607830223 is 32203870602546.

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

It is not a de Polignac number, because 64520607830223 - 2¹ = 64520607830221 is a prime.

It is a super-3 number, since 3×64520607830223³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520607830221) 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, 10753434638368 + ... + 10753434638373.

It is an arithmetic number, because the mean of its divisors is an integer number (21506869276742).

Almost surely, 2^{64520607830223} is an apocalyptic number.

64520607830223 is a deficient number, since it is larger than the sum of its proper divisors (21506869276745).

64520607830223 is a wasteful number, since it uses less digits than its factorization.

64520607830223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21506869276744.

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 64520607830223 in words is "sixty-four trillion, five hundred twenty billion, six hundred seven million, eight hundred thirty thousand, two hundred twenty-three".