64841992320 has 256 divisors, whose sum is σ = 236641305600. Its totient is φ = 14793977856.

The previous prime is 64841992283. The next prime is 64841992337. The reversal of 64841992320 is 2329914846.

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 64841992320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7885171 + ... + 7893389.

It is an arithmetic number, because the mean of its divisors is an integer number (924380100).

Almost surely, 2^64841992320 is an apocalyptic number.

64841992320 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 64841992320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118320652800).

64841992320 is an abundant number, since it is smaller than the sum of its proper divisors (171799313280).

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

64841992320 is a wasteful number, since it uses less digits than its factorization.

64841992320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835 (or 8823 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 64841992320 in words is "sixty-four billion, eight hundred forty-one million, nine hundred ninety-two thousand, three hundred twenty".