64368466921584 has 320 divisors, whose sum is σ = 225627930316800. Its totient is φ = 17150366380032.

The previous prime is 64368466921537. The next prime is 64368466921609. The reversal of 64368466921584 is 48512966486346.

It is a happy number.

64368466921584 is a `hidden beast` number, since 6 + 4 + 3 + 6 + 8 + 466 + 9 + 2 + 158 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 140152 + ... + 11347095.

It is an arithmetic number, because the mean of its divisors is an integer number (705087282240).

Almost surely, 2^{64368466921584} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64368466921584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112813965158400).

64368466921584 is an abundant number, since it is smaller than the sum of its proper divisors (161259463395216).

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

64368466921584 is a wasteful number, since it uses less digits than its factorization.

64368466921584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11487397 (or 11487385 counting only the distinct ones).

The product of its digits is 1433272320, while the sum is 72.

The spelling of 64368466921584 in words is "sixty-four trillion, three hundred sixty-eight billion, four hundred sixty-six million, nine hundred twenty-one thousand, five hundred eighty-four".