64993959360 has 1680 divisors, whose sum is σ = 286068138048. Its totient is φ = 13916897280.

The previous prime is 64993959347. The next prime is 64993959379. The reversal of 64993959360 is 6395939946.

64993959360 is a `hidden beast` number, since 6 + 4 + 9 + 9 + 39 + 593 + 6 + 0 = 666.

It is a congruent number.

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 239 ways as a sum of consecutive naturals, for example, 1226301094 + ... + 1226301146.

Almost surely, 2^64993959360 is an apocalyptic number.

64993959360 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 64993959360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143034069024).

64993959360 is an abundant number, since it is smaller than the sum of its proper divisors (221074178688).

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

64993959360 is a wasteful number, since it uses less digits than its factorization.

64993959360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 42515280, while the sum is 63.

The spelling of 64993959360 in words is "sixty-four billion, nine hundred ninety-three million, nine hundred fifty-nine thousand, three hundred sixty".