64323486720 has 440 divisors, whose sum is σ = 235924839744. Its totient is φ = 16749379584.

The previous prime is 64323486707. The next prime is 64323486739. The reversal of 64323486720 is 2768432346.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17831157 + ... + 17834763.

Almost surely, 2^64323486720 is an apocalyptic number.

64323486720 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 64323486720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117962419872).

64323486720 is an abundant number, since it is smaller than the sum of its proper divisors (171601353024).

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

64323486720 is a wasteful number, since it uses less digits than its factorization.

64323486720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3687 (or 3660 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 45.

The spelling of 64323486720 in words is "sixty-four billion, three hundred twenty-three million, four hundred eighty-six thousand, seven hundred twenty".