64939548960 has 768 divisors, whose sum is σ = 275719127040. Its totient is φ = 14059008000.

The previous prime is 64939548959. The next prime is 64939549001. The reversal of 64939548960 is 6984593946.

64939548960 is a `hidden beast` number, since 6 + 4 + 9 + 3 + 95 + 489 + 60 = 666.

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 127 ways as a sum of consecutive naturals, for example, 19148865 + ... + 19152255.

It is an arithmetic number, because the mean of its divisors is an integer number (359009280).

Almost surely, 2^64939548960 is an apocalyptic number.

64939548960 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 64939548960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137859563520).

64939548960 is an abundant number, since it is smaller than the sum of its proper divisors (210779578080).

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

64939548960 is a wasteful number, since it uses less digits than its factorization.

64939548960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470 (or 3456 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 63.

The spelling of 64939548960 in words is "sixty-four billion, nine hundred thirty-nine million, five hundred forty-eight thousand, nine hundred sixty".