64888504320 has 320 divisors, whose sum is σ = 214211289600. Its totient is φ = 16760438784.

The previous prime is 64888504309. The next prime is 64888504349. The reversal of 64888504320 is 2340588846.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 64888504320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290979729 + ... + 290979951.

It is an arithmetic number, because the mean of its divisors is an integer number (669410280).

Almost surely, 2^64888504320 is an apocalyptic number.

64888504320 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 64888504320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107105644800).

64888504320 is an abundant number, since it is smaller than the sum of its proper divisors (149322785280).

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

64888504320 is an frugal number, since it uses more digits than its factorization.

64888504320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 64888504320 in words is "sixty-four billion, eight hundred eighty-eight million, five hundred four thousand, three hundred twenty".