64323840000 has 480 divisors, whose sum is σ = 245007322560. Its totient is φ = 14696448000.

The previous prime is 64323839969. The next prime is 64323840001. The reversal of 64323840000 is 4832346.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 64323840000.

It is not an unprimeable number, because it can be changed into a prime (64323840001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26878804 + ... + 26881196.

It is an arithmetic number, because the mean of its divisors is an integer number (510431922).

Almost surely, 2^64323840000 is an apocalyptic number.

64323840000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64323840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122503661280).

64323840000 is an abundant number, since it is smaller than the sum of its proper divisors (180683482560).

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

64323840000 is an equidigital number, since it uses as much as digits as its factorization.

64323840000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 64323840000 in words is "sixty-four billion, three hundred twenty-three million, eight hundred forty thousand".