64323559872 has 672 divisors, whose sum is σ = 232935865344. Its totient is φ = 16669900800.

The previous prime is 64323559849. The next prime is 64323559877. The reversal of 64323559872 is 27895532346.

64323559872 is a `hidden beast` number, since 6 + 4 + 3 + 2 + 3 + 559 + 87 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64323559877) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 99417853 + ... + 99418499.

It is an arithmetic number, because the mean of its divisors is an integer number (346630752).

Almost surely, 2^64323559872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64323559872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116467932672).

64323559872 is an abundant number, since it is smaller than the sum of its proper divisors (168612305472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64323559872 is a wasteful number, since it uses less digits than its factorization.

64323559872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 764 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 54.

The spelling of 64323559872 in words is "sixty-four billion, three hundred twenty-three million, five hundred fifty-nine thousand, eight hundred seventy-two".