64323603520 has 112 divisors (see below), whose sum is σ = 167571773568. Its totient is φ = 23323688960.

The previous prime is 64323603493. The next prime is 64323603557. The reversal of 64323603520 is 2530632346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1216677 + ... + 1268443.

Almost surely, 2^64323603520 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 64323603520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83785886784).

64323603520 is an abundant number, since it is smaller than the sum of its proper divisors (103248170048).

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

64323603520 is a wasteful number, since it uses less digits than its factorization.

64323603520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52148 (or 52138 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 34.

The spelling of 64323603520 in words is "sixty-four billion, three hundred twenty-three million, six hundred three thousand, five hundred twenty".