64389722838816 has 192 divisors, whose sum is σ = 177276560065920. Its totient is φ = 20435799121920.

The previous prime is 64389722838811. The next prime is 64389722838817. The reversal of 64389722838816 is 61883822798346.

It is a super-3 number, since 3×64389722838816³ (a number of 42 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (64389722838811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1378092831 + ... + 1378139553.

It is an arithmetic number, because the mean of its divisors is an integer number (923315417010).

Almost surely, 2^{64389722838816} 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 64389722838816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88638280032960).

64389722838816 is an abundant number, since it is smaller than the sum of its proper divisors (112886837227104).

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

64389722838816 is a wasteful number, since it uses less digits than its factorization.

64389722838816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53619 (or 53611 counting only the distinct ones).

The product of its digits is 1337720832, while the sum is 75.

The spelling of 64389722838816 in words is "sixty-four trillion, three hundred eighty-nine billion, seven hundred twenty-two million, eight hundred thirty-eight thousand, eight hundred sixteen".